JP3861873B2 - Music system and music data transmission / reception device - Google Patents

Description

  The present invention relates to a music system capable of transmitting and receiving music data such as waveform data (waveform sample data) and performance data (performance data of MIDI format and other formats) via a network, and further relates to a music data transmitting / receiving apparatus. .

Configured so that music data such as waveform data (waveform sample data) and performance data (performance event data such as MIDI) can be transmitted and received in a network configured in accordance with a predetermined communication standard corresponding to multimedia (for example, IEEE 1394 standard). Music systems (for example, music systems according to the applicant's development called under the trademark “mLAN”). In such a music system, a plurality of nodes such as control devices such as personal computers and various music devices (synthesizers, tone generators, recorders, mixers, etc.) such as waveform data and / or MIDI data are stored. A system is configured by connecting devices having an input / output function or a playback function, and a large number of waveform data streams or MIDI data streams can flow from any node to any plurality of nodes. There are the following publicly known documents related to this.
Japanese Patent Laid-Open No. 10-32606 JP 2000-78170 A JP 2000-278353 A

  Japanese Patent Application Laid-Open No. H10-228561 discloses that in a music system as described above, a word clock is used to perform waveform data processing by synchronizing sample times among a plurality of nodes. In Patent Documents 2 and 3, when a data packet including waveform data of a plurality of samples is transmitted, the information indicating the sample number, that is, the sample time is converted into information indicating the future sample time obtained by adding a predetermined offset value. It is shown that this is added to the packet and transmitted. In the reproduction node, the waveform data is reproduced when the future sample time added to the received waveform data arrives, and thereby, the transfer time delay (and time fluctuation) can be absorbed. Japanese Patent Application Laid-Open No. 2004-228561 shows that audio data (waveform data) and performance data such as MIDI data are transmitted and received in the music system as described above. In this case, the MIDI data reproduction processing is performed by the CPU on the transmission side, and is transmitted in the transmission packet at the reproduction (performance) timing, so that it is affected by temporal fluctuations in the transmission path thereafter. There's a problem.

  In a conventional music system, when input music data is transmitted from a music device to a control device (PC) for recording, the current sample time or sample number when the music data is generated is transmitted as it is as described above. The timing information added to the music data to be transmitted is not the timing information added to the music data to be transmitted, but the future sample time or sample number obtained by adding a predetermined offset value to the current sample time or sample number. . In the control device that has received the music data transmitted from the music device, when the received music data is stored in the storage device, the (future) sample time or sample number added with the offset after receiving the music data Therefore, the music data can be reproduced at the timing indicated by the timing information added to the music data by absorbing the transfer time delay as described above. At this time, the sample time or sample number of the received music data recorded in the storage device is changed to that indicated by the timing information of the timing at which the control device reproduces the music data.

  On the other hand, when the stored music data is transmitted from the control device (PC) to the music device, timing information is generated by adding a predetermined offset value to the current sample time or sample number when transmitting the music data. The timing information added with the offset is added to the music data for transmission. Therefore, also in this case, the music device that has received the music data transmitted from the control device reproduces the music data at the timing of the (future) sample time or sample number to which the offset has been added after receiving the music data. Therefore, reproduction processing that absorbs the transfer time delay is possible.

  As described above, as the timing information added to the music data included in the packet to be transmitted, the timing information indicating the future sample time or sample number obtained by adding a predetermined offset value to the current sample time or sample number is used instead of the current sample time or sample number. Is not particularly noticeable when the input music data is simply transferred and played back on the receiving side, but when the received music data is temporarily recorded, read out and transferred for playback. In this case, an offset value is accumulated by a plurality of transmissions, which causes an unexpected large timing shift. That is, the delay time (playback delay time) from when the music data stored on the PC is read out and transferred to the music device until the music data is played back on the music device, and the music data played back on the music device are Delay when transferring to PC again and recording (for example, transferring music data mixed from music data transferred from PC and newly input music data to PC for recording) Time (recording delay time) overlaps.

  Further, when waveform data and performance data are simultaneously transferred and reproduced or recorded as music data, in the conventional music system, the offset value that appears as a delay in the actual reproduction timing of each sample of waveform data is the same as MIDI. Therefore, there is a problem in that there is a difference in reproduction timing or performance timing on recorded data between the two data. Therefore, the conventional music system is not suitable for transmitting waveform data and performance data such as MIDI together and reproducing them synchronously.

The present invention has been made in view of the above, I der intended to provide a music system that can solve the problems and disadvantages associated therewith transfer time delay of the music data, the waveform data and performance data It is an object of the present invention to provide a music system that is inconvenient when transferred and played back or recorded together.

According to a first aspect of the present invention, there is provided a music system having a waveform input function and a waveform reproduction function , and a waveform connected to the music apparatus via a network and sequentially reproduced. look including a control device for storing and reading in the storage unit samples, a music system which records and reproduces waveform concurrently, the control device and the musical instrument counts the sampling period of the waveform, respectively The sample counters are synchronized with each other via the network, and in the recording system of the music system, the music device inputs the music sample into the sample data of the input waveform. It includes an input control means for transmitting grant timing information corresponding to the count value of the sample counter of the device, and the control Location receives the sample data of the transmitted waveform, and the sample data thus received includes a recording control means for storing in said memory means in an order according to the timing information given to the sample data, and In the playback system of the music system, the control device reads the sample data of the waveform in the playback order after the sample data corresponding to the count value of the sample counter of the control device from the storage means, Read control means for adding timing information according to the playback order to the sample data and transmitting it, and the music device receives the sample data of the transmitted waveform, and the received sample data Playback processing is performed at a timing according to the timing information given to the sample data and the sample counter of the music device. Characterized by comprising a reproduction control means for.

According to the present invention , a music device and a control device connected via a network each have a sample counter that counts a waveform sampling period, and these sample counters are synchronized with each other via the network. Has been. In the recording system, the input control means of the music device transmits the input waveform sample data with timing information corresponding to the count value of the sample counter of the music device, and the recording control of the control device The means receives the sample data of the transmitted waveform, and stores the received sample data in the storage means of the control device in the order according to the timing information given to the sample data. In the reproduction system, the readout control means of the control device reads the sample data of the waveform in the reproduction order after the sample data corresponding to the count value of the sample counter of the control device from the storage means, and the read sample The timing information corresponding to the playback order is added to the data and transmitted, and the playback control means of the music device receives the sample data of the transmitted waveform, and adds the received sample data to the sample data Playback processing is performed at a timing according to the timing information and the sample counter of the music device.
As a result, the waveform sample data stored in the storage means of the control device is played back at an accurate timing corresponding to the storage order in the music device even though the music device and the control device are connected via the network. At the same time, the waveform sample data input by the music device can be stored in the storage unit of the control device in the storage order corresponding to the exact timing. For example, in a music device, when sample data of another waveform is input while listening to sound based on the sample data of the waveform to be reproduced, timing information indicating the same timing as the timing information of the sample data of the waveform to be reproduced is input. Therefore, the sample data of the waveform to be reproduced and the sample data of the waveform to be recorded can be synchronized with accurate timing.
Also, in the recording system, when the waveform sample data transmitted from the music device is received and stored in the control device on the receiver side , it corresponds to the sample time having a time delay corresponding to the offset value as in the prior art. Are stored in the order according to the timing information corresponding to the count value of the sample counter of the music instrument on the sender side, and there is no recording delay time. Therefore, the conventional inconvenience is solved .

Further, in the reproduction system, the sample data of the reproduction order of the waveform after the sample data corresponding to the count value of the sample counter from the memory means of the control device is read out, timing information which is in accordance with the reproduction order Therefore, there is no time delay corresponding to the offset value as in the prior art, and the timing information corresponding to the original reproduction order of the sample data is maintained. In the receiving side music equipment, with the appropriate transfer time lag, but it receive the sample data, the sample data itself thus received is corresponding to the reproduction order after the sample data corresponding to the count value of the sample counter at the time of transmission also becomes one corresponding to the reproduction order also available so the timing information given to it. Therefore, reproduction can be performed without any inconvenience by performing reproduction processing on the received waveform sample data at a timing according to the timing information given to the sample data. As described above, in the playback system, when the waveform sample data transmitted from the control device is played back by the music device on the receiver side, an offset value equivalent to the original sample time of the music data as in the past is used. Is not reproduced at the time delay sample time, but is reproduced according to the timing information given to the waveform sample data , and there is no reproduction delay time. Therefore, the conventional inconvenience is solved.

Thus, the present invention relates to a recording delay time at the sample data recording waveform can be substantially zero. In addition, it is possible to substantially zero the reproduction delay time at the time of sample data reproduction waveform Also, there is no problem of expansion of timing deviation due to the cumulative offset value. Therefore, recording and reproduction of waveform sample data transferred via the network can be performed in synchronization with accurate timing of the sample counter .

According to the music system of the second aspect of the present invention, the music device further has a function of inputting a performance and a playback function of the performance, and the control device further plays back sequentially. Event data of performances to be performed is stored in and read out from the storage means, and the music system is a music system that simultaneously records and reproduces waveforms and performances, and includes a recording system of the music system. In this case, the music device includes second input control means for transmitting the input performance event data with second timing information corresponding to the count value of the sample counter of the music device, and transmitting the second timing information. wherein the controller receives the event data of the performance of the transmitted and based stomach beat the second timing information added to the event data thus received to the tempo map Into a third timing information to quasi it has provided a second recording control means for storing the event data in the storage unit by adding the timing information of the third, also the reproduction of the music system In the system, the control device reads the event data of the performance at the event time after the event time corresponding to the count value of the sample counter of the control device from the storage means, and is given to the read event data. A second read control means for converting the third timing information into the second timing information based on a tempo map, and adding the second timing information to the event data and transmitting the event data; And the music device receives the event data of the transmitted performance, and adds the received event data to the event data Characterized by comprising a second reproduction control means for reproducing processing at the timing according to the sample counter of the second timing information and the music equipment is.
As a result, not only recording / reproduction of waveform sample data but also recording / reproduction of performance event data can be performed simultaneously with accurate timing.
Further, in the recording system, when the performance event data input by the music device is transmitted with second timing information corresponding to the count value of the sample counter of the music device , the control device receives the received first data 2 The timing information is converted into the third timing information based on the tempo map, and the event data is stored by adding the third timing information, so that the second timing information corresponding to the count value of the sample counter is stored. By appropriately providing the corresponding third timing information based on the tempo map, it is possible to prevent a deviation in performance timing on recording of performance event data and waveform sample data.

In the reproduction system, the event data of the performance at the event time after the event time corresponding to the count value of the sample counter of the control device is read from the storage means of the control device , and the read event data The third timing information given to the second timing information is converted to the second timing information based on the tempo map, and the event data is sent with the second timing information, so the second timing information given at the time of transmission is transmitted . The timing information 2 reflects the actual performance timing of the performance event data. Therefore, by reproducing process event data of the performance received music instrument at a timing according to the timing information of the second given to the event data, without any inconvenience, it can be reproduced. Accordingly, when the waveform data is reproduced at the same time, it is possible to prevent a deviation in the performance timing in reproducing the performance data and the waveform data.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a block diagram showing a basic configuration example of a music system according to the present invention. This music system is composed of a plurality of nodes connected via a network conforming to a predetermined communication standard such as IEEE 1394 standard (or other standard such as USB). In the figure, as a basic example of a node, a control device 10 including at least a storage device and a music device 20 are shown, and other devices 51 and 52 are appropriately connected. The control device 10 is a device that sends the music data recorded there to the music device 20, and is realized by, for example, a personal computer PC. The network connection format is not limited to the chain connection method in which the nodes are sequentially connected in a chain as shown in the figure, but may be a method in which the nodes are connected via a hub device. A method of connecting to the equation may be used.

In order to use this music system for recording music data, as the music device 20, a device having at least a waveform input / output function and / or a MIDI input / output function is used and transmitted from the music device 20 via a network. The received music data is received by the control device (PC) 10 and stored in the storage device. In addition, in order to use this music system for music data playback, a device having a music playback function is used as the music device 20, and the control device (PC) 10 receives the music data read from the storage device via the network. Is transmitted to the music device 20 and received and played back by the music device 20. In the present invention, it is concurrently rows that Umono recording and reproduction of the music data. The music device 20 includes any music-related device such as an electronic musical instrument such as a music synthesizer, an automatic performance device such as a sequencer, a waveform recording device such as a recorder, a signal processing device such as a mixer or an effector, and a sound source device. Applicable. Note that the control device 10 and the music device 20 are functional definitions and do not uniquely define a specific hardware configuration. For example, even if a music-related device such as a synthesizer is attached to a storage device and a computer or processing device, the computer or the storage device stores music data transferred from other music devices in the storage device. When controlling with a processing apparatus, it functions as the control apparatus 10 in this invention. Of course, when a music-related device such as the same synthesizer receives and reproduces music data transferred from another control device or music device, it functions as the music device 20 in the present invention. Therefore, the other devices 51 and 52 shown in FIG. 1 can be either the control device 10 or the music device 20 when defined from their functions. Note that “music data” is used to include both waveform data (sample data of an audio waveform) and performance data composed of performance event data such as MIDI.

A specific example of the music data transfer method compliant with the IEEE 1394 standard is also described in the above-described prior art (Patent Documents 1, 2, and 3), and similar data transfer is also performed in the music system according to this embodiment. A method may be adopted by adopting it where necessary. That is, when transferring music data in the music system according to this embodiment, a known IEEE 1394 standard-compliant data transfer method is adopted as the lower structure, and a specific data transfer method according to the present invention is adopted as the upper structure.
Accordingly, the lower-level data transfer method conforming to the IEEE 1394 standard may adopt a well-known configuration, and a detailed description thereof will be omitted.

[Cycle master]
In a network conforming to the IEEE 1394 standard, a cycle operation in which 125 μs is one cycle is performed. That is, one of a plurality of nodes connected to the network becomes a cycle master, which is measured by the “cycle timer” of its own node and indicated by the cycle timer of that node every predetermined transmission cycle period (for example, 125 μs). A cycle start packet including the cycle time is transmitted. Isochronous transfer is started by using the cycle start packet as a trigger, and asynchronous transfer is started when the isochronous transfer is completed. Nodes other than the cycle master take in the cycle start packet and set their “cycle timer” to the cycle time of the cycle start packet. In this way, the cycle time indicated by the “cycle timer” of all the nodes connected to the network is matched with the cycle time measured by the cycle master. The cycle time is used as common time information in the network. The cycle timer operates with a predetermined high-speed clock (for example, 25 MHz).

[Word clock master]
In a music LAN (local area network system for music data) proposed by the present applicant, a plurality of nodes connected to the network perform music data processing operations at a common sampling period. Each node includes a “sample counter” that increments the sample number as means for advancing the current sample number as time passes. In that case, in order to synchronize the progress of the current sample number of all the nodes, any one of the plurality of nodes becomes the word clock master, and the current sample number is advanced in common according to the sampling clock of the word clock master. Control synchronization. The frequency of the sampling clock of the word clock master corresponds to the sampling frequency (for example, 48 kHz, etc.) of the audio waveform data to be handled. The node that becomes the word clock master generates a word clock packet including the current sample number and its cycle time information at a time interval of every predetermined number of samples (for example, every 8 samples), and broadcasts it to the network. A node other than the word clock master becomes a word clock slave, receives this word clock packet, and generates a sampling clock of the node based on the sample number and cycle time included in the packet. Then, the sampling clock is counted. The value of the sample counter of its own node is matched with the sample number of the received word clock packet. Thus, the time progression of the current sample number (ie, the value of the “sample counter”) at all nodes is synchronized by the word clock master. Note that the cycle time information transmitted in the word clock packet is obtained by offset addition of the cycle time indicated by the cycle timer of the word clock master by the communication delay time (for example, 352 μs) compensated in the IEEE 1394 standard. In each node, when the cycle time indicated by its own cycle timer becomes the cycle time information included in the word clock packet, the value of the sample counter of its own node is matched with the sample number included in the word clock packet. This absorbs the communication delay time and synchronizes the time progress of the current sample number (that is, the value of the “sample counter”) at all nodes.

The technique of synchronizing the cycle time indicated by the “cycle timer” of each node by the cycle master and the word clock master as described above, and synchronizing the sample count, that is, the sample number indicated by the “sample counter” of each node, A well-known thing may be used by the said patent documents 1-3.
Furthermore, the contrivances in the present embodiment relating to the cycle master and the word clock master are as follows.

  Since a device operating as a word clock slave synchronizes the word clock of the device with the word clock of another device (master), the word clock of the device may cause a shift in tracking or a fluctuation accompanying the tracking. . In contrast, a device operating as a word clock master generates a word clock only from the cycle timer or system clock of the device regardless of the word clock of the other device. Extremely high stability. An accurate current sample number is required for the music device 20 that inputs and outputs external waveform data and MIDI data. On the other hand, the control device 10 may be slightly shifted or slightly shifted as long as a rough sample number is obtained. There is no problem even if it is unstable. Therefore, it is preferable to operate the music device 20 as a word clock master, thereby allowing the music system according to the present embodiment to perform a stable operation. On the other hand, with respect to the cycle master, since the cycle timer counts the cycle time at a clock frequency much faster than the sampling frequency, any node can be operated as the cycle master. Therefore, the control device 10 or the music device 20 may be the cycle master. Of course, the control device 10 may be operated as a word clock master. In this case, the music device 20 needs to have a precise clock system so that it can be accurately synchronized with the word clock.

Next, an example of the hardware configuration of the control device 10 and the music device 20 will be described with reference to FIG.
The control device 10 is typically composed of a personal computer (PC), a CPU 11, a hard disk 15 for storing received music data and other data and programs, and a flash memory 12 for storing programs and data in a nonvolatile manner. Further, a RAM 13 for program working and temporary storage of data, a timer 14, an operation device 16, such as a keyboard and a mouse, a display 17, a TCP / IP interface 18 and the like are connected via a CPU bus 19, and this embodiment is further implemented. A music LAN interface 31 that controls transmission / reception of music data according to an example is connected to the CPU bus 19. The program stored in the hard disk 15 is transferred to the RAM 13 and developed on the RAM 13. The PC can run a predetermined OS such as Windows (registered trademark), and the OS includes drivers for IEEE1394 and LAN interface. By executing the music software (sequencer software) on the OS, the PC executes the function as the control device 10.

  The music device 20 includes a CPU 21, a flash memory 22 that stores programs and data in a nonvolatile manner, a RAM 23 for working and temporary storage of data, a timer 24, an operation device 26, a display 27, and the like connected via a CPU bus 25. It consists of an electronic device having a microcomputer configuration. The flash memory 22 stores an embedded OS for the music device 20 and an embedded program for operating as a music device. The music device 20 is further connected to the CPU bus 25 by a MIDI input / output interface 28 for inputting / outputting MIDI format performance data and a waveform input / output interface 29 for inputting / outputting analog or digital waveform data. In addition, a waveform processing unit 30 for appropriately processing waveform data input / output via the waveform input / output interface 29 is provided. Further, a music LAN interface 32 that controls transmission / reception of music data according to the present embodiment is connected to the CPU bus 25. The waveform processing unit 30 may have an appropriate waveform processing function depending on the purpose of the music device 20 (mixer, effector, sound source, synthesizer, etc.). For example, mixing processing, filter processing, effect processing, sound source processing (waveform forming processing), waveform reproduction processing, and the like may be appropriately performed. As an example, the waveform processing unit 30 may be configured by a DSP (digital signal processor), and the waveform processing function may be appropriately set by a DSP microprogram. The waveform input / output interface 29 includes an analog / digital converter, a digital / analog converter, a buffer memory, and the like, and inputs or outputs digital or analog waveform data in real time according to an appropriate sampling frequency. The waveform input / output interface 29 is connected to a pickup microphone (not shown), a sound system for audio sound generation, other waveform data input / output devices, and the like. The MIDI input / output interface 28 inputs or outputs MIDI performance data in real time or non-real time, and is connected to a performance input / output keyboard, MIDI musical instrument, sequencer or other MIDI input / output device. Of course, the music device 20 itself may have a sequencer function (automatic performance data playback function). The music device 20 itself may be an electronic musical instrument such as a synthesizer having a performance operation keyboard.

  The music LAN interfaces 31 and 32 include a buffer memory such as a FIFO for buffering music data to be transmitted / received, a processor function and a timer function for executing necessary transmission / reception control / processing functions as described later. To do. The music LAN interfaces 31 and 32 have a double structure of an interface part conforming to the IEEE 1394 standard as a lower structure and a specific music interface part according to the present invention as an upper structure. The aforementioned “cycle timer” is included in the lower IEEE 1394 standard-compliant interface unit, and the “sample counter” is included in the upper music interface unit. The CPUs 11 and 21 of each node can read the value of the “sample counter” in their music LAN interfaces 31 and 32 via the CPU buses 19 and 25, thereby appropriately performing processing according to the current sample number. Can do.

  For example, the sample number included in the word clock packet is composed of 8 bits. In this case, the “sample counter” may be an 8-bit binary counter. However, it immediately overflows, making it difficult to manage the sample number as an absolute value and difficult to use. Therefore, the “sample counter” included in the music LAN interfaces 31 and 32 of each node may be extended to a 32-bit binary counter. In that case, continuous sample times (sample numbers) can be managed with absolute values of up to about 24 hours. In order to synchronize the “sample counter” extended to 32 bits at each node, the value of all 32 bits of the cycle counter of the word clock master is included in the word clock packet to be transmitted at the time of reproduction start, bus reset, etc. It is only necessary to transmit and match the 32-bit sample counter values of other nodes. If it does so, once it matches exactly with the value of 32 bits, it synchronizes with the word clock packet at any time, so the sample count value (32 bits) of each device always matches. Further, the 32-bit sample counter value is periodically included in a word clock packet and transmitted in a long cycle of several seconds or several tens of seconds, so that the 32-bit sample counter value of another node can be timed. Good.

FIG. 3 is a diagram functionally illustrating a processing example related to transmission / reception of music data between the control device 10 and the music device 20.
As described above, the music LAN interfaces 31 and 32 include the cycle timers CTa and CTb and the sample counters SCa and SCb, respectively, which are synchronized by the cycle master and the word clock master. The sample counters SCa and SCb advance the current sample number with the passage of time according to a predetermined sampling frequency according to the instruction of the word clock master. For example, when sample number and time information for a predetermined number of samples (for example, 8) is transmitted in a word clock packet, the sample time included in the transmitted word clock packet (this sample time is represented by cycle time). And the current cycle time indicated by the cycle timers CTa and CTb coincide with each other by setting the sample number included in the word clock packet corresponding to the sample time in the sample counters SCa and SCb. Synchronize the node sample numbers. In addition, the sampling clock is oscillated in synchronization with the coincidence timing by the phase lock loop included in the music LAN interfaces 31 and 32, and the sample counters SCa and SCb are incremented by this sampling clock, so that the word clock master The current sample number can be advanced over time according to the sampling frequency, and this can be done synchronously at all nodes.

  Each of the music LAN interfaces 31 and 32 includes hardware and software that perform the functions of the transmission processing units Tx1 and Tx2 and the reception processing units Rx1 and Rx2. Each of the transmission processing units Tx1 and Tx2 includes a transmission buffer (for example, a FIFO) for sequentially buffering data packets immediately before being sent out to the network, and each of the reception processing units Rx1 and Rx2 is connected via the network. A reception buffer (for example, a FIFO) for sequentially buffering data packets transmitted in this manner. Music data for a plurality of channels can be transmitted / received in one data packet. Therefore, the transmission buffer and the reception buffer are configured to buffer music data for each channel. For example, as shown in the prior art, the waveform data is transmitted using the first to sixth channels, and the MIDI performance data is transmitted using the seventh to eighth channels. Depending on the nature of the music data, it is better to use different transmission channels.

  The control device 10 executes music software, records music data input from the music device 20 based on the current sample number, and plays back the recorded music data using the music device 20. At that time, music data transmission / reception processing according to the present invention is performed by the functions of the transmission processing units Tx1, Tx2 and the reception processing units Rx1, Rx2 in the music LAN interfaces 31, 32 of the control device 10 and the music device 20. Hereinafter, according to the embodiment of the music data transmission / reception processing, (1) waveform data recording processing, (2) waveform data reproduction processing, (3) performance data recording processing, and (4) performance data reproduction processing will be described. A description will be given for each type of processing purpose. For the sake of simplification, the following description will be made on the transmission / reception processing of waveform data or performance data for a certain channel.

(1) Recording processing of waveform data This is done by, for example, inputting waveform data via the waveform input / output interface 29 (FIG. 2) of the music device 20, and by the transmission processing unit Tx1 of the music LAN interface 32 of the music device 20. A data packet of the waveform data is created and transmitted to the network, which is received by the reception processing unit Rx1 of the music LAN interface 31 of the control device 10 connected to the network, and the received waveform data is received by the control device 10 This is a process of storing in the storage device, that is, the hard disk 15 (FIG. 2). If the waveform input via the waveform input / output interface 29 (FIG. 2) of the music device 20 is an analog waveform, it is converted to digital waveform data by an analog / digital converter (ADC 29A in FIG. 3), and the waveform processing unit 30 ( 2) is subjected to appropriate real-time processing (filtering, mixing, routing, etc.), and is given to the transmission processing unit Tx1.

  FIG. 4B illustrates a timing chart of processing performed when the waveform data is transmitted by the transmission processing unit Tx1 of the music device 20. For example, when a data packet is generated and transmitted every approximately 125 μs, waveform data of a plurality of samples input in a certain time section T1 having a time length of approximately 125 μs is sequentially stored in the transmission buffer of the transmission processing unit Tx1. The transmission processing unit Tx1 creates a packet by using the waveform data of a plurality of samples stored in the transmission buffer as a data packet for one channel, and at this time, the current sample number corresponding to the waveform data of the first sample (in FIG. 4) A sample count value indicating (Sct) is fetched from the sample counter SCb and added to the data packet. In this way, a data packet is created by adding timing information (sample count value, ie, sample number) corresponding to the current sample number (Sct) to the waveform data corresponding to the input waveform, and this is transmitted (see FIG. 4). DPTx). Since the waveform data of multiple samples in one data packet is continuous, the current sample number of one (for example, the first) sample can be given to the data packet, and the current sample numbers of the remaining samples can be identified from there. There is no problem because it can. Of course, the method is not limited to this, and a method as disclosed in Japanese Patent Laid-Open No. 9-298558 may be used. Thus, the present invention is characterized in that the waveform data is transmitted with the timing information corresponding to the current sample number of the waveform data to be transmitted as it is. That is, the sample offset value is not added to absorb the communication delay time, that is, the delay in the reception timing of the waveform data at the receiving node, which has been conventionally performed. In the figure, “S number” is an abbreviation of “sample number”.

  The transmitted data packet is received by the reception processing unit Rx1 of the control device 10 and sequentially stored in the reception buffer. In the reception processing unit Rx1, the waveform data of the reception buffer is collected at every first predetermined time (for example, 1 ms) and DMA-transferred and output to the internal memory (RAM 13 in FIG. 2). For this DMA transfer, a hardware interrupt is generated every first predetermined time (for example, 1 ms) by the cycle timer CTa. Data packets transmitted every 125 μs are stored in the reception buffer for 1 ms, and these are collectively transferred by DMA. Note that the first predetermined time is not limited to just 1 ms, but DMA transfer is easy if the time is the number of samples that is a multiple of 8 such as 64 samples.

FIG. 5B illustrates a timing chart of processing performed when the reception processing unit Rx1 of the control device 10 receives waveform data. When a certain current sample number Scx based on the count value of the sample counter SCa in the music LAN interface 31 is used as a reference, the waveform data group W1 having a sample number within the past 1 ms to plus α (corresponding to communication delay time) is received. The DMA transfer is performed from the buffer to the internal memory. The waveform data group W1 stored in the internal memory is stored (arranged) in association with the sample number indicated by the timing information assigned thereto.
For reference, FIG. 4 also illustrates the time position corresponding to the same sample number Scx. From this point, the waveform data group W1 that has been received in the reception buffer of the reception processing unit Rx1 of the control device 10 at the time of the sample number Scx (or that is DMA-transferred from there to the internal memory) It can be understood that the waveform data of the sample number Sct is included. 4 and 5 are illustrated with different time scales, and the time axis of FIG. 4 is enlarged and displayed.

  The control device 10 can perform effect processing with plug-ins on the waveform data received and transferred and stored in the internal memory as described above. The plug-in effect processing for the received waveform data is indicated by the symbol PEF1 in FIG. This plug-in effect processing is executed every second predetermined time (for example, 10 ms) longer than the first predetermined time by software interruption by the CPU 11. That is, effect processing is performed on the waveform data of 10 ms transferred and stored in the internal memory. When a certain current sample number Scx based on the count value of the sample counter SCa in the music LAN interface 31 is used as a reference, a waveform data group W2 having a sample number corresponding to 10 ms in the past (for example, about 30 ms past) is more appropriate. Plug-in effect processing is applied. In this case, the effect can be applied while keeping the sample number assigned when the waveform data is input.

  In the control device 10, the processing of reading out the waveform data that has been subjected to the plug-in effect processing and stored in the internal memory as described above from the internal memory, transferred to the hard disk 15, and written is performed by the software interrupt by the CPU 11. This is executed every third predetermined time (for example, 100 ms) longer than the predetermined time of 2. This hard disk writing process is denoted by reference numeral WR in FIG. That is, the waveform data for a plurality of clusters corresponding to about 100 ms stored in the internal memory are collectively transferred and stored in the hard disk 15. When a certain current sample number Scx based on the count value of the sample counter SCa in the music LAN interface 31 is used as a reference, the waveform of the sample numbers corresponding to a plurality of clusters corresponding to about 100 ms in a suitable past (for example, about 500 ms past). The data group W3 is transferred and stored in the hard disk 15. The waveform data group W3 stored in the hard disk 15 is stored (arranged) in association with the sample number indicated by the timing information assigned thereto. In this manner, the control device 10 can record the timing information corresponding to the sample number assigned to the music data at the input of the music device 20 without changing.

(2) Waveform Data Reproduction Processing This is to read the waveform data stored in the storage device of the control device 10, that is, the hard disk 15 as described above, and to transmit the transmission processing unit Tx 2 (FIG. 3) of the music LAN interface 31 of the control device 10 ) To create a data packet of the read waveform data and transmit it to the network, which is received by the reception processing unit Rx2 (FIG. 3) of the music LAN interface 32 of the music device 20 connected to the network. This is processing for reproducing the waveform data by the music device 20.
FIG. 5A illustrates a timing chart related to the reading of waveform data from the hard disk 15 and the plug-in effect processing and transmission processing based on the waveform data performed by the control device 10.

When the waveform data file to be read from the hard disk 15 is designated, the control device 10 reads the waveform data of the file from the top in the order of the sample numbers. The control device 10 executes the process of reading the waveform data from the hard disk 15 every third predetermined time (for example, 100 ms) by a software interrupt by the CPU 11. This hard disk read processing is indicated by the symbol RE in FIG. That is, the waveform data for a plurality of clusters corresponding to about 100 ms stored in the hard disk 15 is read out collectively and transferred and stored in the internal memory (RAM). Of course, the sample number of the waveform data read from the hard disk 15 and transferred and stored in the internal memory is managed accurately by the control device 10.
Based on the current sample number Scx at a certain time point based on the count value of the sample counter SCa in the music LAN interface 31, a sample for a plurality of clusters corresponding to about 100 ms in a more appropriate future (for example, about 500 ms future). The numbered waveform data group Wt3 (see FIG. 5A) is read from the hard disk 15 and transferred and stored in the internal memory.

  The control device 10 can perform effect processing by plug-in on the waveform data to be transmitted that is transferred and stored in the internal memory as described above. The plug-in effect processing for this transmission waveform data is indicated by the symbol PEF2 in FIG. This plug-in effect process is executed every second predetermined time (for example, 10 ms) by a software interrupt by the CPU 11. That is, the effect processing is performed collectively on the waveform data for 10 ms out of the waveform data for 100 ms stored in the internal memory. When the current sample number Scx at a certain time point based on the count value of the sample counter SCa is used as a reference, the waveform data group Wt2 of the sample numbers corresponding to 10 ms in the future (for example, about 30 ms in the future) (FIG. 5A Plug-in effect processing is applied to (see)). In this case as well, the effect can be applied while maintaining the sample number assigned when the waveform data is input.

  In the transmission processing unit Tx2 of the control device 10, the waveform data that has been subjected to the plug-in effect processing and stored in the internal memory as described above is DMA-transferred from the internal memory every first predetermined time (for example, 1 ms). And stored in the internal transmission buffer. For this DMA transfer, a hardware interrupt is generated every first predetermined time (1 ms) by the cycle timer CTa. When the current sample number Scx at a certain time point based on the count value of the sample counter SCa is used as a reference, the waveform data group Wt1 of sample numbers corresponding to 1 ms in the future (for example, the future of about 5 ms) (FIG. 5A) )) Is DMA-transferred from the internal memory to the transmission buffer. The sample number of the waveform data transferred and stored in the internal memory is the sample number at the time of recording each sample by the control device 10, and the sample number is also maintained for the waveform data DMA-transferred from the internal memory to the transmission buffer. No changes are made.

  Further, the transmission processing unit Tx2 of the control device 10 extracts waveform data of a plurality of samples from the transmission buffer according to the order of the sample numbers, creates a packet as a data packet for one channel, and converts the waveform data of the first sample into Information indicating the corresponding sample number is given to the data packet as timing information. However, the waveform data stored in the transmission buffer is preceded by about 5 ms as described above, that is, corresponds to the future sample number, and the timing information given thereto is also the current sample number indicated by the sample counter SCb. The waveform data itself is the original sample number (future sample number as viewed from the current sample number).

  In this way, a data packet is created by adding timing information corresponding to the sample number to the waveform data read from the hard disk 15 in the order corresponding to the sample number and buffered in the transmission buffer, and this is transmitted to the network. Is done. The process of extracting the waveform data from the transmission buffer and creating the data packet is performed, for example, in 125 μs, which is one cycle of the transmission cycle, and a data packet made up of waveform data of a plurality of samples generated within that time is created. In this manner, as described above, a data packet including a plurality of samples of waveform data is generated and transmitted every 125 μs. As described above, since the waveform data of a plurality of samples in one data packet is continuous, the sample number of one (for example, the first) sample may be given to the data packet, and the sample numbers of the remaining samples are also there. There is no problem because it can be identified from.

  As described above, in the present invention, even when the recorded waveform data is read and transmitted and reproduced on the receiving side, the original sample number of the waveform data to be transmitted (the side of the music device 20 when recording the waveform data). It is characterized in that the waveform data is transmitted with the timing information corresponding to the sample number) assigned as is. That is, the sample offset value for absorbing the delay of the reception timing of the waveform data at the receiving node as in the past is not added at the time of transmission. Instead, the waveform data is read from the storage device (hard disk 15 or internal memory) ahead of the time of the original sample number, and about 5 ms ahead of the time of the original sample number. The waveform data packet is transmitted to the network. As a result, the communication delay time, that is, the delay in the reception timing of the waveform data at the receiving node is absorbed.

  That is, the transmitted data packet is received by the reception processing unit Rx2 of the music device 20, and sequentially stored in the reception buffer. FIG. 4A illustrates a timing chart of processing performed when the reception processing unit Rx2 of the music device 20 receives waveform data. DPRx in the figure indicates the timing of receiving one data packet. For example, the data packet DPRx received at a time point before the sample number Scx includes waveform data of the (future) sample number Scy after the sample number Scx. Note that the reception buffer for waveform data in the reproduction path (the reception processing unit Rx2 of the music device 20) is configured by a FIFO having a capacity capable of reliably storing, for example, waveform data of the number of samples of about 5 ms. For example, a FIFO having a capacity of 512 words may be used to support waveform data having a sampling frequency of up to 96 kHz. In contrast, the waveform data reception buffer in the recording path (the reception processing unit Rx1 of the control device 10) does not require a large capacity.

  In this way, the waveform data received by the reception processing unit Rx2 is sequentially stored in the reception buffer, and the reception buffer stores the current sample number at a certain time based on the count value of the sample counter SCb in the music LAN interface 32. When Scy is reached, the waveform data corresponding to the current sample number Scy is read out. In this way, when the time corresponding to the original sample number to which the waveform data stored in the reception buffer has been given comes, the data is sequentially read from the reception buffer. The read waveform data is subjected to appropriate real-time processing, output from a digital-analog converter (DAC 29B in FIG. 3), and is sounded through a sound system. In this way, the reception node completes the reception and stores the waveform data in the reception buffer before the sample time of the sample number assigned to the received packet arrives, so the arrival of the sample time of the assigned sample number. Accordingly, the waveform data can be read and reproduced without any problem.

(3) Recording processing of performance data This is, for example, when performance data such as MIDI is input via the MIDI input / output interface 28 (FIG. 2) of the music device 20, and transmission processing of the music LAN interface 32 of the music device 20 is performed. A data packet of the performance data is generated by the unit Tx1 and transmitted to the network, and this is received by the reception processing unit Rx1 of the music LAN interface 31 of the control device 10 connected to the network, and the received performance data is controlled by the control unit 10 This is processing to be stored in the storage device of the device 10, that is, the hard disk 15 (FIG. 2). For example, it is assumed that performance data in the MIDI format is generated in response to a keyboard performance in real time in a MIDI output type electronic musical instrument and is input to the music device 20 via the MIDI input / output interface 28 (FIG. 2). Give an explanation. This performance data is event data such as note-on, note-off, or control change, and is a known performance data format including note number data indicating a key-on (or off) note, velocity data, MIDI channel data, etc. It may consist of

  In the music device 20, the performance data input from the MIDI input / output interface 28 (MIDI in 28A in FIG. 3) is given to the transmission processing unit Tx1. At this time, if necessary, musical tone generation processing corresponding to the performance data may be simultaneously performed by internal processing of the music device 20. Of course, the musical instrument 20 may not perform the sound generation process, but may perform the sound generation process with a MIDI output electronic musical instrument connected thereto. The transmission processing unit Tx1 of the music device 20 stores the input performance data in the transmission buffer and adds timing information corresponding to the current sample number to the performance data based on the count value of the sample counter SCb. Remember. In this case, the timing information may be automatically given by the music LAN interface 32, the MIDI input / output interface 28 or the CPU 21. Thus, the performance data is stored in the transmission buffer as a pair of the performance data itself and the current sample number (timing information) corresponding to the event occurrence time related to the performance data.

  As described above, the transmission processing unit Tx1 reads the pair of performance data and timing information stored in the transmission buffer, creates a data packet of performance data every 125 μs, and transmits it to the network. Since performance data events do not occur so frequently, if there is no performance data to be transmitted in the transmission buffer, it is of course possible not to create a data packet. Therefore, generally, the performance data transmission buffer requires a very small capacity. Note that the timing information given to the performance data to be transmitted is not limited to the current sample number corresponding to the current sample number when the performance data is written to the transmission buffer, but is the current sample number when the performance data is read from the transmission buffer and sent to the network. It may be a corresponding one. In this way, even when performance data is transmitted, the performance data is transmitted with the timing information corresponding to the current sample number assigned to the performance data to be transmitted as it is.

  The transmitted data packet of performance data is received by the reception processing unit Rx1 of the control device 10 and taken into its reception buffer (FIFO). The reception processing unit Rx1 transfers the performance data and timing information stored in the reception buffer (FIFO) to the reception data buffer set in a predetermined area of the internal memory as needed or at predetermined time intervals (for example, 1 ms). FIG. 6A shows an example of performance data reception processing in the reception processing unit Rx1. FIG. 6A shows an example of performance data reception event processing performed by the music LAN interface 31 of the control device 10. FIG. 6A is performed as reception event processing each time a data packet of transmitted performance data is taken into the reception buffer (FIFO). In step S1, the performance data fetched into the reception buffer (FIFO) and timing information attached thereto are read. In step S2, the read performance data and timing information attached thereto are transferred to the reception data buffer on the internal memory (RAM). To do.

  In the control device 10, the timing information of the performance data received as described above and stored in the reception data buffer of the internal memory is converted into the second information based on the tempo map by, for example, software interruption every 10 ms. Processing to convert to timing information is performed. FIG. 6B shows an example of interrupt processing every 10 ms performed by the CPU 11 of the control device 10 for recording / reproducing performance data. The processing at the time of reception in FIG. 6B will be described. In step S3, it is checked whether the reception data buffer of the internal memory is empty, that is, whether unprocessed data is stored. If the received data buffer in the internal memory is not empty, that is, there is unprocessed data, the process goes to step S4 to perform processing for converting the timing information into second timing information based on the tempo map. That is, the timing information (sample number) given to the performance data stored in the reception data buffer is converted into a time stamp (second timing information) based on the beat according to the tempo map. As is well known, the tempo map is information for associating the sample number of the waveform data with the performance position of the performance data (how many beats and what beat) in the recorder. The accuracy required for the timing of the performance data does not have to be as high as that of the waveform data, and changes according to the tempo, so the timing information is converted according to the tempo map. In the next step S5, the performance data with the converted time stamp (second timing information) is written in a predetermined recording area on the internal memory (RAM).

  Further, the control device 10 reads performance data with the converted time stamp (second timing information) written in a predetermined recording area on the internal memory (RAM) as described above from the internal memory. The process of transferring and writing to the hard disk 15 is executed every third predetermined time (for example, 100 ms) by a software interrupt by the CPU 11.

(4) Reproduction processing of performance data This is to read performance data stored in the storage device of the control device 10, that is, the hard disk 15, and read it out by the transmission processing unit Tx2 (FIG. 3) of the music LAN interface 31 of the control device 10. The performance data data packet is generated and transmitted to the network, which is received by the reception processing unit Rx2 (FIG. 3) of the music LAN interface 32 of the music device 20 connected to the network. This is processing to be played back by the music device 20.
In the control device 10, first, prior to the start of reproduction (for example, about 500 ms in advance as described above), performance data files (for example, files for one song) to be transmitted are collectively collected from the hard disk 15 as appropriate. The data is read out and transferred and stored in a predetermined transmission area of the internal memory. Then, the performance data in the predetermined transmission area is sequentially read out and sequentially transferred to the transmission buffer (FIFO) of the transmission processing unit Tx2 by the interrupt process every 10 ms shown in FIG. 6B. Since the performance event does not occur as frequently as the waveform sample timing, the transfer to the transmission buffer (FIFO) may be appropriately performed while checking the empty state (the transmitted state) of the transmission buffer (FIFO). . Also, the performance data transmission buffer (FIFO) in the transmission processing unit Tx2 may have a small capacity. The maximum number of performance events that can be held in this performance data transmission buffer (FIFO) is Imax. This Imax only needs to correspond to the maximum number of performance events that can occur during at least 10 ms. For example, even a number of about several to ten events seems to be sufficient.

  In step S11 in FIG. 6B, the data has already been transferred from the predetermined transmission area of the internal memory to the transmission buffer (FIFO) of the transmission processing unit Tx2, but is not yet reproduced (not yet transmitted and held in the transmission buffer). The number of performance data events is detected, and the detected number n is set in a register. In step S12, the detected number n of unreproduced events is subtracted from the maximum number Imax of performance events that can be held in the performance data transmission buffer (FIFO), and the number of events x to be additionally transferred to the transmission buffer (FIFO) is obtained. Ask. If it is determined in step S13 that x is not 0, in step S14, the performance data of the first x events among the untransferred performance data stored in the predetermined transmission area of the internal memory and the performance data are added thereto. Read time stamp (second timing information). In step S15, the time stamp of the performance data of the read x events is converted into a sample number according to the tempo map. For example, each time stamp may be converted into a unique sample number by referring to a predetermined reference sample number (for example, a sample number corresponding to the reproduction start time of the music is used as the reference sample number) according to the tempo map. In step S16, the performance data of x events having the converted sample number (or corresponding timing information) is written in the empty area of the transmission buffer (FIFO) of the transmission processing unit Tx2. If x = 0 (that is, if the transmission buffer of the transmission processing unit Tx2 is full of untransmitted performance data) at the time of this 10 ms interruption, the processing of steps S14 to S16 is not performed. Note that the method of transferring performance data to the transmission buffer (FIFO) of the transmission processing unit Tx2 is not limited to the example of obtaining the number of additional events x as shown in FIG. The performance data of future events may be transferred in a time-controlled manner so as to be transferred for a predetermined time interval.

Thus, the sample number for each performance data written in the transmission buffer (FIFO) of the transmission processing unit Tx2 corresponds to the sample number of the actual reproduction event time of the performance data. Since the performance data is read from the storage device, that is, the hard disk 15 and the internal memory, prior to the actual playback event timing, the sample numbers attached to these performance data are the current values counted by the sample counter SCa. The sample number in the future is shown rather than the sample number. In the transmission processing unit Tx2 of the control device 10, the performance data for one or a plurality of events and the sample number assigned thereto are extracted from the transmission buffer according to the sample number order (reproduction order), and a performance data data packet is created. Send this to the network. The process of extracting the waveform data from the transmission buffer and creating a data packet is performed every 125 μs, which is one cycle of the transmission cycle. Of course, if there is no performance data to be transmitted in the transmission buffer, a data packet of performance data is not created.
As described above, even when the recorded performance data is read out and transmitted and reproduced on the receiving side, timing information corresponding to the sample number corresponding to the reproduction event time of the performance data to be transmitted is given to the performance data. Send.

The transmitted data packet of performance data is received by the reception processing unit Rx2 of the music device 20, and sequentially stored in the reception buffer for the performance data. In the reception buffer, when the current sample number at a certain time point based on the count value of the sample counter SCb in the music LAN interface 32 is reached, the music LAN interface 32 notifies the CPU 21 to that effect, and the CPU 21 notifies the current sample number. The performance data with the sample number corresponding to is read. In this way, when the performance data stored in the reception buffer arrives at the time corresponding to the sample number assigned thereto, the performance data is sequentially read from the reception buffer. The music device 20 performs a musical tone reproduction (pronunciation start or pronunciation end) process or a performance reproduction state control process related to the performance event indicated by the read performance data in real time.
In the above embodiment, information consisting of the sample number itself is used as timing information to be added to the music data at the time of transfer. In short, any information that can clarify the time relationship of time-series sample numbers may be used.

  As described above, according to the present invention, in the recording system, the music data transmitted from the music device is given timing information corresponding to the current sample number, and the music data received by the control device is the music data. They are stored in the storage means in the order according to the timing information given to the data. Therefore, when the music data transferred by this music system is stored on the receiver side, it is not stored corresponding to the sample time having a time delay corresponding to the offset value as in the prior art, and the actual sample is not stored. It is stored corresponding to the sample time corresponding to the number, and there is no delay time in recording. Therefore, there is no inconvenience that timing information is reattached every time music data is transferred for recording.

  In the playback system, the music data in the playback order after the current sample number (that is, the future) is read from the storage means of the control device, and this is the data after the current sample number corresponding to the playback order ( In other words, since the timing information corresponding to the sample number in the future is added and transmitted, there is no time delay corresponding to the offset value in the conventional timing information, and the original sample number of the music data is not included. Corresponding timing information is maintained. The music device on the receiving side receives this music data packet with an appropriate transfer time delay, but the received music data itself corresponds to the playback order after the current sample number at the time of transmission (future samples And the timing information given to it also indicates a sample number (future sample number) after the current sample number at the time of transmission, so that the received music data is included in the music data. By performing the reproduction process at the timing according to the given timing information, the reproduction can be performed without any inconvenience. In this way, when music data transferred by this music system is played back on the receiver side, it is played back at a sample time that is delayed by a time corresponding to the offset value from the original sample time of the music data as in the past. Therefore, the music data is reproduced at the original sample time, and there is no delay time during reproduction. Therefore, there is no inconvenience that the offset value corresponding to the communication delay time is repeatedly added every time music data is transferred for reproduction (or recording).

  In addition, when waveform data (sample data) and performance data (event data) are transferred and reproduced or recorded together, timing information corresponding to the original sample number of the waveform data and performance data is added. Since transfer processing is performed, it is possible to appropriately reproduce or record each waveform data and performance data in accordance with the original sample number, so that there is no deviation in the time relationship between the two according to the progress of the common sample number. Therefore, it is possible to perform processing without inconvenience.

1 is a block diagram showing a basic network configuration example of a music system according to the present invention. The block diagram which shows the hardware structural example of a control apparatus and a music apparatus as an example of the node which comprises this music system. FIG. 3 is a diagram functionally illustrating a processing example related to transmission / reception of music data between the control device and the music device in FIG. 2. (A) is a timing chart exemplarily explaining processing performed when waveform data is received by the reception processing unit of the music device, and (b) is when waveform data is transmitted by the transmission processing unit of the music device. The timing chart explaining the process performed illustratively. (A) is a timing chart exemplarily explaining a process performed when waveform data is transmitted by the transmission processing unit of the control device, and (b) is performed when waveform data is received by the reception processing unit of the control device. The timing chart explaining the process which is performed exemplarily. (A) is a flowchart showing an example of performance data reception processing in the reception processing unit of the control device, and (b) is an interrupt for every 10 ms performed for recording / reproducing performance data by the CPU of the control device. The flowchart which shows an example of a process.

Explanation of symbols

10 Control device (for example, personal computer PC)
20 music equipment 11 and 21 CPU
12, 22 Flash memory 13, 23 RAM
15 Hard disk 28 MIDI input / output interface 29 Waveform input / output interface 30 Waveform processing unit 31, 32 Music LAN interface CTa, CTb Cycle timer SCa, SCb Sample counter Tx1, Tx2 Transmission processing unit Rx1, Rx2 Reception processing unit

Claims (2)

A music device having a function of inputting a waveform and a function of reproducing a waveform , and a control device that is connected to the music device via a network and stores / reads waveform samples to be sequentially reproduced in a storage means only including, a music system that performs recording and reproduction of the waveform simultaneously in parallel,
The music device and the control device each have a sample counter that counts a waveform sampling period, and the sample counters are synchronized with each other via the network,
In the recording system of the music system,
The music device comprises input control means for giving timing information corresponding to the count value of the sample counter of the music device to the sample data of the input waveform and transmitting it,
And,
Wherein the controller receives the sample data of the transmitted waveform, and the sample data thus received includes a recording control means for storing in said memory means in an order according to the timing information given to the sample data,
Also,
In the playback system of the music system,
The control device reads the sample data of the waveform in the reproduction order after the sample data corresponding to the count value of the sample counter of the control device from the storage means, and outputs the timing information corresponding to the reproduction order to the read sample data. Read control means for giving and transmitting,
And,
Reproduction control means for the music device to receive the sample data of the transmitted waveform and to process the received sample data at a timing according to timing information given to the sample data and a sample counter of the music device A music system comprising: The music device further has a function of inputting a performance and a function of reproducing the performance,
Also,
The control device further stores / reads event data of performances to be reproduced sequentially in the storage means,
The music system is a music system that records and reproduces waveforms and performances simultaneously,
In the recording system of the music system,
The music device includes second input control means for adding and transmitting second timing information corresponding to the count value of the sample counter of the music device to the input event data of the performance,
And,
Wherein the controller, the receiving the transmitted event data of the performance was the third timing information to said received event data granted the second reference had to beat based timing information to tempo map Converting, adding the third timing information, and storing the event data in the storage means, the second recording control means,
Also,
In the playback system of the music system,
The control device reads out event data of performance at an event time after an event time corresponding to the count value of the sample counter of the control device from the storage means, and the third timing given to the read event data A second read control means for converting the information into the second timing information based on a tempo map, adding the second timing information to the event data, and transmitting the second timing information;
And,
The music device receives event data of the transmitted performance, and the received event data is reproduced at a timing according to the second timing information added to the event data and the sample counter of the music device The music system according to claim 1, further comprising second reproduction control means .

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