JP2001215972A - Musical sound generation device, and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate musical sound edited in waveforms by processing waveform edition such as pitch adjustment concerning waveform data of musical sound such as metronome sound, without involving the addition of a large scale of hardware. SOLUTION: Fundamental waveform data of a metronome waveform are stored in a flash ROM 58. A recorder CPU 14 creates the waveform data of the metronome sound pitch-adjusted by processing waveform editing operation based on the fundamental waveform data, and stores the waveform data in SDRAMs 64, 66. A DRC 68 reads the waveform data of the metronome sound from the SDRAMs 64, 66 and reproduces them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for generating a repetitive sound such as a metronome sound and a rhythm sound, a single sound such as a sampler sound and other musical sounds, and a recording / reproducing device incorporating the device. In the case where a musical tone is generated by adding waveform adjustment such as pitch adjustment and envelope adjustment to the basic waveform data of the musical tone prepared as described above, this is realized without adding large-scale hardware.

[0002]

2. Description of the Related Art Some electronic musical instruments have a function of generating and generating a metronome sound, and a performer can perform while listening to the function. When recording a performance with a multi-track recorder or the like, it is convenient if a metronome sound is generated and a player can perform and record while listening to the metronome. It is also convenient if a metronome sound is generated at the time of reproduction after the performance so that the player or the mixer can confirm a tempo shift or the like. The metronome sound generator generates a metronome sound by preparing basic metronome sound waveform data in a memory and repeatedly reading the data at a cycle corresponding to the performance tempo. It is convenient to have a function that can adjust In order to perform pitch adjustment, waveform editing processing such as pitch shift processing and envelope correction processing such as attack and release for correcting expansion and contraction of the envelope due to the pitch shift is required.

FIG. 2 shows a configuration example of a conventional metronome sound generator having a pitch adjusting function. Waveform memory 1 is R
Basic waveform data of a metronome sound (waveform data of the first and second and subsequent measures in a bar), which is composed of a nonvolatile memory such as an OM and a flash ROM.
I remember. The phase generator 2 corresponds to the reading speed of the samples of the waveform memory 1 for realizing the pitch specified by the player (the higher the reading speed, the higher the pitch, and the lower the speed, the lower the pitch). A sample clock and a subdivided clock obtained by subdividing one cycle of the sample clock into a number of sample points are output. The address generator 3 counts the sample clock and creates a read address of the waveform memory 1.
Metronome sound samples are sequentially read from the waveform memory 1 in accordance with the addresses. The interpolator 4 inputs the metronome sound sample and the subdivided sample clock, and interpolates the sample values at a plurality of timings in the subdivided clock in order to generate the metronome sound sample at a specified sampling period. A sample value of the metronome sound at a timing at which the metronome sound is to be generated is obtained. The envelope generator 5 expands / contracts the envelope of the metronome sound due to the pitch shift processing (the higher the pitch, the shorter the time required to read a sample from the waveform memory 1; therefore, the shorter the envelope, the lower the pitch, the longer the time required to read the sample). Therefore, a coefficient that changes as time progresses is output to correct the envelope.) The multiplier 6 adds a sample value output from the interpolator 4 to the envelope generator 5.
Multiply by the coefficient generated in and output. In this way, the metronome sound is reproduced at the pitch specified by the player.
By repeating the above calculation every time a metronome sound is generated, the metronome sound is repeatedly reproduced at the pitch specified by the player.

[0004]

The operation for pitch adjustment is large in scale and requires high-speed processing. Conventionally, it is necessary to provide a circuit for the processing with hardware as shown in FIG. There was a problem that the scale of hardware became large. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in terms of pitch adjustment and envelope adjustment for basic waveform data of a metronome sound, a repetitive sound such as a rhythm sound, a single sound such as a sampler sound, and other musical sounds prepared in a storage device. It is an object of the present invention to provide a tone generator and a recording / reproducing apparatus incorporating the tone generator by adding waveform editing such as this, without adding large-scale hardware.

[0005]

According to the present invention, there is provided a musical tone generating apparatus comprising: a basic waveform data storage device for storing basic waveform data of a musical tone; and reading out the basic waveform data from the basic waveform data storage device. A waveform editing operation unit that performs a waveform editing operation according to an appropriate waveform editing parameter according to the waveform editing operation program, an edited waveform data storage device that stores the waveform data of the musical tone whose waveform has been edited, and a storage device that stores the edited waveform data A memory control unit for reading out the waveform data of the musical tone whose waveform has been edited from the apparatus at an appropriate sampling cycle (in the case of a repetitive tone, it is repeatedly read in accordance with a designated tempo). According to the present invention, waveform editing is performed in advance on the basic waveform data stored in the basic waveform data storage device, and the result of the waveform editing operation is stored in the edited waveform data storage device. (In the case of repetitive sounds, read out repeatedly according to the instructed tempo) to generate a musical tone, so that it is not necessary to perform a large-scale and high-speed waveform editing operation in real time each time a musical tone is generated. . Therefore, the waveform editing operation can be performed by an operation based on a program in an existing CPU or the like, and the waveform editing can be performed without generating a large-scale addition of hardware to generate a musical tone. The waveform editing parameter may include, for example, a parameter indicating one or both of a pitch shift amount of the musical tone and an envelope waveform.

A recording / reproducing apparatus according to the present invention records sound data input from the outside into an external storage device via a buffer memory, reads out the sound data recorded on the external storage device, and reads the sound data via the buffer memory. A basic waveform data storage device which is configured to be able to output the basic waveform data of a musical tone, reads the basic waveform data from the basic waveform data storage device, and reads the basic waveform data according to a predetermined waveform editing calculation program. A waveform editing operation unit for performing a waveform editing operation in accordance with appropriate waveform editing parameters; storing the waveform data of the waveform-edited musical sound in a partial area of the buffer memory; and storing the sound data in the buffer memory. While recording or reproducing through another area, the waveform data of the musical tone stored in the buffer memory is synchronized with the recording or reproduction, (For repetitive sounds, repeatedly read in accordance with the designated tempo) is read by time division and writing and reading of the audio data to the buffer memory is made by and a memory controller to play.

Further, the recording / reproducing apparatus of the present invention writes time-divisionally input sound data of a plurality of channels input from the outside into an area allocated to each channel in a buffer memory, reads out the data in a time-division manner, And read out the sound data of a plurality of channels recorded in the external storage device, write in a time division manner to the individually allocated area of the buffer memory, read out the data in a time division manner, and output it to the outside. And writing and reading of sound data to and from the buffer memory for reproduction of one or more channels and writing and reading of sound data to and from the buffer memory for recording of one or more other channels are performed in a time-division manner. Basic that is configured so that it can be performed in parallel and stores the basic waveform data of musical sounds And shape data storage device reads the basic waveform data from said basic waveform data storage device in accordance with a predetermined waveform editing operation program, a waveform editing arithmetic unit for performing waveform editing operation in accordance with editing appropriate waveform parameters,
The waveform data of the edited musical tone is stored in an area of the buffer memory other than the area to which the plurality of channels are assigned, and the sound data of the plurality of channels is stored in the area of the buffer memory to which the individually assigned area is assigned. While recording or playing back, in synchronization with the recording or playback,
The waveform data of the tone stored in the other area of the buffer memory is read out in a time-division manner with writing and reading of the sound data to and from the buffer memory. And a memory control unit for repeatedly reading out and reproducing. In this case, the waveform editing parameters can be appropriately set according to the operation of the user, and the set waveform editing parameters are stored in the external storage device, and a song for recording or reproducing (recording or reproducing is performed). A corresponding waveform editing parameter is read from the external storage device in accordance with the designation of a song, for example, one song = one music, and the waveform editing operation is performed in accordance with the waveform editing parameter. can do. The recording / reproducing apparatus according to the present invention may include, as the waveform editing parameters, for example, a parameter indicating one or both of a pitch shift amount of the musical tone and an envelope waveform.

According to the recording / reproducing apparatus of the present invention, in addition to the effect of the musical tone generating apparatus, the waveform data of the edited musical tone is stored in a partial area of the buffer memory for writing and reading the audio data. Therefore, it is possible to read out the waveform data of the musical tone whose waveform has been edited by writing and reading out the sound data and time-divisionally, so that the buffer memory for the sound data and its write / read control structure are also used. The waveform data of the musical tone whose waveform has been edited can be read, and the musical tone whose waveform has been edited can be reproduced with a simple configuration.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to the generation of a metronome sound in a digital mixing recorder (hard disk recorder) using a hard disk device (hereinafter "HDD") as an external storage device will be described. . The hard disk recorder is configured to be able to reproduce a metronome sound according to an arbitrary instruction of an operator (a player or the like) when recording or reproducing a performance or simultaneous recording and reproduction. The pitch of the metronome can be adjusted by the operator. FIG. 3 shows a system configuration of a main part of the entire hard disk recorder. The hard disk recorder 10 performs signal processing on sound data of a plurality of channels ｛individual tracks (not only signal paths physically divided for each channel, but also time-division processing of sound data of each channel. Physically includes a common signal path) or the sound data itself flowing through the signal path.信号 signal path, simultaneous recording of multiple tracks (eg, simultaneous recording of up to 16 tracks) or simultaneous playback of multiple tracks (eg, simultaneous playback of up to 16 tracks) or simultaneous recording and simultaneous playback of multiple tracks (eg, up to 16 tracks) It is possible to record up to 8 tracks simultaneously while playing back simultaneously. The sound data of one sample of each track is composed of 16 bits (2 bytes) except that the mixed down signal is composed of 24 bits (3 bytes).

The hard disk recorder 10 has a main C
PU12, recorder CPU14, sub-CPU16, a total of three one-chip CPUs (microcomputers) {for example, Hitachi S
H7042 (single chip RISC microcomputer). The CPUs 12, 14 and 16 are independently driven by mutually prepared operation clocks which are asynchronous with each other. The main CPU 12 mainly performs mixing control.
The recorder CPU 14 controls recording and reproduction of the HDD 60 and waveform editing control based on instructions from the main CPU 12. The recorder CPU 14 also performs a metronome sound waveform editing operation. The sub CPU 16 performs control for transmitting various operation information by the operator to the main CPU 12, and performs motor drive control for each fader operator based on a command from the main CPU 12.

The bus 18 of the sub CPU 16 includes various controls 20, such as switches, rotary knobs, a mouse, a jog, and a shuttle, a flash ROM 22 storing a program for the sub CPU 16, a motor driver interface 24, and the like. It is connected. A plurality of motor-driven fader operators 26 are connected to the motor driver interface 24 via a motor driver 28. The operation position information of each motor-driven fader operator 26 is transmitted to the sub CPU 16. In each of the operators 20, the mixing parameter ｛routing (recording each input channel to which track via which signal path channel, and reproducing each track reproduction signal via which signal path channel, by an operation of the operator. Assignment of which output channel to output), setting of equalizer characteristics, effect characteristics, localization (PAN), etc., and various operation instructions of the recorder function such as recording / playback / stop / pause / slow playback / fast forward / rewind , Song selection, operation mode switching such as recording / playback mode / editing mode, and waveform editing. The on / off setting of the metronome sound reproduction, the pitch adjustment of the metronome sound, and the like are also performed by the various controls 20. The recording / playback mode includes a mode for performing normal recording and playback for each part {a mode in which only recording (ALL REC), only playback, and recording (SYNC DUBBING) is performed simultaneously with playback}, and a punch-in and punch-in mode. Out mode,
There is a mode for performing mixdown. Various controls 20
Is transmitted to the sub CPU 16 and the signal line 3
0 to the main CPU 12. Each fader operator 26 controls the level of each input channel and each output channel, the level of the stereo output, and the like by the operation of the operator.
16 and transmitted to the main CPU via a signal line 30.
12 is transmitted. In the recording / playback mode, the fader level of each playback track is adjusted by the main CPU 12 from the fader controls 26 according to the progress of the song.
Of the sub CPU 1 via the signal line 30
6 are sequentially transmitted to the motor driver interface 24.
And each fader operator 2 via the motor driver 28
6 are automatically controlled to move to the commanded operation positions. As a result, the operation position of each fader operator 26 set at the time of recording is reproduced, and the reproduction level of each track is automatically adjusted to the state set at the time of recording, and reproduction is performed.

A bus 32 of the main CPU 12 has a flash ROM 3 in which a program for the main CPU 12 is stored.
4 and the mixing functions (routing, equalizing, adding effects, adjusting fader levels,
As song management data relating to localization adjustment, etc., sequence data relating to set values of these parameters according to the progress of time are stored, and a DRAM 36 serving as a work area of the main CPU 12, a DSP 38 realizing a mixing function, and an LCD LC via control circuit 41
A D (liquid crystal display) 43 and an FL (fluorescence) display 47 are connected via an interface 45. LCD4
3 displays information corresponding to the operation mode. For example, in the recording / playback mode, displays for routing, channel on / off, virtual track selection, etc. are displayed, and the waveform editing mode (increases / decreases in the level of recorded sound data, cuts noise components, etc.) In this mode, the waveform of the portion to be edited is graphically displayed. The FL display 47 displays numerical time information (time code) and the level of an input signal or a reproduced signal of each channel by a bar graph. The virtual track is a virtual track assigned to each track (real track), and each track (real track) to be reproduced during reproduction or simultaneous recording / reproduction.
, One virtual track can be selected and reproduced one by one from a plurality of virtual tracks respectively assigned. For example, if there are 16 tracks,
8 virtual tracks per track
Then, a total of 128 virtual tracks can be created.

The DSP 38 constitutes a mixing processing section for a plurality of channels, and is based on the operation of various operators 20 and fader operators 26 by an operator, or a DRAM.
In accordance with the sequence data relating to the mixing function stored in 36, the main CPU 12 instructs the recording input and playback output to perform the mixing functions such as routing, equalizing, effect addition, fader level adjustment, and localization adjustment, respectively. A process (mixing process) for realizing the performed contents is executed.

An analog audio signal (recording input) of a plurality of channels (for example, up to eight channels) input from the analog input terminal 40 is supplied to a gain control (not shown).
After the gain is adjusted to an appropriate signal level at the time of A / D conversion, the signal is converted into a digital signal by the A / D converter 42 and input to the DSP 38 for mixing processing. Further, digital audio signals (recording input) of a plurality of channels (for example, up to 16 channels) input from the digital input terminal 44 are input to the D through an interface 46.
The signal is input to SP38 and subjected to mixing processing. The recording input that has been subjected to the mixing process is transmitted to the HDD 6 described later.
Recorded at 0. A digital audio signal (reproduced output) of a plurality of channels (for example, up to 16 channels) reproduced from the HDD 60 is subjected to mixing processing by the DSP 38 and output from the digital output terminal 54 via the interface 52. A signal obtained by mixing the digital audio signal into a two-channel stereo signal by the DSP 38 is converted into an analog signal by the D / A converter 48, and is output from the analog output terminal 50 as a monitor signal or the like.

A bus 56 of the recorder CPU 14 corresponds to a flash ROM 58 storing a program of the recorder CPU 14 (including a metronome sound waveform editing operation program) and basic waveform data of the metronome sound, and corresponds to an external storage device of the present invention. HDD 60 and DRAM
62 and SDRA corresponding to the buffer memory of the present invention.
A DRAM controller (hereinafter referred to as “DRC”) 68 for controlling writing and reading of sound data to and from an M (synchronous DRAM) 64 and 66;
An optical disk device 72 such as a CD-RW and a real-time clock 76 for generating data of the current date and time are connected via a parallel interface 74.
The optical disk device 72 converts the song recorded on the HDD 60 to C
A CD-R that is backed up to a DR disk or CD-RW disk and stores a version-up program and a version-metronome sound basic waveform data
OM and the like are reproduced and flash ROMs 22, 34, 58
The program is used to update the above program or to add or update the basic metronome sound waveform data in the flash ROM 58. In predetermined regions of the SDRAMs 64 and 66, metronome sound waveform data (the first waveform data of a bar and the waveform data shared by the second and subsequent measures, and the waveform data edited as necessary) are stored. When the metronome sound reproduction is turned on by the operator, the metronome sound is repeatedly read and reproduced at the tempo specified by the operator.

FIG. 4 shows an example of dividing the address area of the HDD 60.
Shown in The address area of the HDD 60 is divided into a fixed-capacity system management data address area 84 from the beginning and a shared address area 86 following the end. In the shared address area 86, sound data for each channel is sequentially recorded and stored as digital signals in the take order from the front end, and the sound data area 86-0 is sequentially enlarged and formed, and the rear end is formed. From the song management data area 86-
1, 86-2,... Are sequentially formed. The sound data is recorded in clusters (128 Kbytes). One cluster is composed of 64K words (samples), and in the case of CD format data (16 bits, 44.1 kHz), 6 clusters are used.
With 4K samples / 44.1 kHz, data for about 1.45 seconds is obtained. Once the sound data is recorded, it is not deleted unless an instruction to delete the corresponding take is given by the operator. When recording multiple tracks simultaneously,
The sound data of each track is sequentially exchanged and recorded in the shared address area 86. The sound data added later by punch-in, punch-out, etc., and the sound data whose waveform is edited are the sound data of the initial recording of the track. The sound data of each virtual track is recorded at the end of the recorded sound data in the shared address area 86 at the time when they are recorded, apart from the recorded address. Are recorded in clusters in a distributed manner.

A song management data area 86 for each song
.., 86-2,... Are recorded in such a distributed manner, and the sound data of each virtual track included in the song are required to be reproduced as continuous music. Sequence data indicating a chain of recording addresses of sound data is recorded. The song management data areas 86-1, 86-2,...
Contains sequence data related to the mixing function for each virtual track included in the song, waveform editing parameters for the metronome sound (pitch shift amount corresponding to the pitch adjusted for each song, and envelope waveform for performing the waveform editing operation). Are also recorded. Song management data area 86- for each song
Are fixed capacity (for example, 1.5 Mbytes per song), and each time the operator instructs to create a new song file, the song management data area for that song Is newly initialized and secured, and every time sound data such as recording is added to the song, the song management data is updated accordingly. Song management data area 86-1, 86- for each song
Are fixed once defined, and are not deleted unless an explicit song deletion instruction is given by the operator. In the system management data address area 84, system management data including data for knowing the recording position of the song management data for each song is recorded.

The song management data is stored in units of a song in HDD units.
60 are sequentially recorded from the rear end of all address areas. However, individual song management data areas 86-1 and 86 are recorded.
Within -2,..., Data is recorded in the normal direction (the direction in which the address increases) from the front side as usual.し か も and individual song management data areas 86-1, 86-2, ...
Is fixed, the last address information of all the address areas of the HDD 60 is recorded in the system management data address area 84, so that the song management data areas 86-1, 86-2,. Can be obtained by calculation. For example, the start position of the song management data area 86-1 of the first song can be obtained by calculating [the last address of the entire address area of the HDD 60]-[the capacity of one song management data area]. Instead of the calculation, the song management data area 86-1 of each song is stored in the system management data address area 84.
86-2,... Can also be recorded. In the above example, the last address of the shared address area is matched with the last address of all the address areas of the HDD 60, but the present invention is not limited to this.

According to the above file configuration, when the power of the hard disk recorder 10 is turned on, the head address of the HDD 60 is automatically accessed to read the system management data, and when the song is designated, Based on the system management data, an address area (song management data area) where the song management data of the specified song is recorded is read to read the song management data, and when the reproduction of the song is instructed, The sound data of the virtual track can be reproduced by sequentially accessing and reading the address where the sound data is recorded for each currently selected virtual track of the song based on the song management data.

In FIG. 3, a DRAM 62 includes an HDD
The sequence management data read from the system management data and the song management data relating to the currently specified song for performing recording, reproduction, editing, etc., include sequence data indicating a chain of recording positions in the HDD 60 and waveform editing parameters of a metronome sound. Is stored. Also, DRAM6
Reference numeral 2 functions as a work area of the recorder CPU 14. The sound data is transferred between the DSP 38 and the DRC 68 via the bus 3
The signals are mutually transmitted via a signal line (not shown) that does not pass through the signal lines 2 and 56.

The bus 32 of the main CPU 12 and the recorder C
The bus 56 of the PU 14 is mutually connected via a dual port RAM 78 (hereinafter, referred to as “DPRAM”).
Information such as various commands and song management data to be transmitted and received between the U12 and the recorder CPU 14 is transmitted. A sampling clock is oscillated from the sampling clock oscillator 80 and input to the AND circuit 82. Recorder C
The PU 14 outputs an operation section instruction signal which rises in synchronization with the start of recording or reproduction and falls in synchronization with the end thereof, and is input to the AND circuit 82. This allows
The AND circuit 82 outputs a section sampling clock from the start to the end of recording or reproduction. This sampling clock is input to external clock input terminals of the main CPU 12 and the recorder CPU 14. Both C
Counters for counting clocks input from the external clock input terminals are arranged in the PUs 12 and 14, respectively. Both counters are reset in synchronization with the start of recording or reproduction, and count the subsequently input sampling clocks. The main CPU 12 executes a mixing process in sampling clock units according to the count value. Further, the recorder CPU 14 executes write or read control of the HDD 60 and the SDRAMs 64 and 66 in units of a sampling clock according to the count value. As a result, the main CPU 12 and the recorder CPU 14 operate at the respective operation clocks (for example, 28 MHz) while simultaneously performing the sampling cycle (48
(kHz, 44.1 kHz, etc.), the units operate in synchronization with each other, and control for recording or reproduction can be executed independently and in parallel.

The transmission and reception of data (sound data, system management data, and song management data) in the recording / playback mode in the hard disk recorder 10 of FIG. 3 and the editing and generation of a metronome sound will be described with reference to FIG. When the power of the hard disk recorder 10 is turned on,
The system management data is read from the system management data address area of the HDD 60, and is read via the bus 56.
It is held in the RAM 62. When a song is designated, the recorder CPU 14 refers to the system management data stored in the DRAM 62, accesses the song management data area of the HDD 60 where the song management data of the designated song is recorded, and Read data. Among the read song management data, sequence data relating to the mixing function of the song is stored in the bus 5.
6, DRAM 3 via DPRAM 78 and bus 32
6 is transferred. Among the read song management data, sequence data indicating a chain of recording positions of a series of sound data of the song in the HDD 60 is stored in the bus 56.
Through the DRAM 62. As a result, operations such as recording, playback, and waveform editing can be performed on the designated song according to an instruction from the operator. For the song to be recorded for the first time, by the operation of the operator,
A new song file is created in advance (a new song management data area is initialized and secured in the HDD 60), and the song management data is held in the DRAMs 36 and 62 to be ready for recording. .

In the recording / playback mode, the following process is performed on a track for which recording is instructed. A recording signal (sound data) of the track input from the analog input terminal 40 or the digital input terminal 44 is supplied to the DSP 38 via the A / D converter 42 or the interface 46.
Are mixed by the DSP 38 in accordance with the operation of the various operators 20 and the fader operators 26 by the operator, and the DRC 68 constitutes a buffer memory from the DRC 68 via a signal line not passing through the bus 56.
M64 and 66 are sequentially stored. SDRAM 64, 66
Is periodically stored in the H via the bus 56.
The data is DMA-transferred to the DD 60 and recorded. At this time, of the newly generated system management data and song management data, sequence data indicating a chain of playback positions is sequentially stored in the DRAM 62, and sequence data relating to the mixing function of the song management data is stored in the DRAM 62.
36 sequentially. When the recording is completed and the saving operation is performed, the sequence data relating to the mixing function stored in the DRAM 36 is transmitted to the bus 56 via the DPRAM 78, and together with the data indicating the chain of the recording positions of the sound data in the HDD 60 stored in the DRAM 62, H
The data is overwritten and saved in the song management data area of the DD 60 which stores the song management data of the song. Also, DRAM
The system management data stored in the HDD 62 is also stored in the HDD 60.
Overwritten in the system management data address area.

In the recording / playback mode, the following processing is performed on a track for which playback is instructed. The recorder CPU 14 sequentially reads out the sound data of the corresponding track from the HDD 60 with reference to the sequence data stored in the DRAM 62 and indicating the chain of the reproduction position of the track. The read sound data is DMA-transferred to the SDRAMs 64 and 66 via the bus 56 and the DRC 68 and stored. The DRC 68 is used for the SDRAMs 64 and 66.
Are sequentially read out at the sampling cycle. The sound data read from the SDRAMs 64 and 66 is transmitted to the DRC 6 via a signal line that does not pass through the bus 56.
8 to the DSP 38. Main CPU 12 is D
The parameters of the DSP 38 are set with reference to the sequence data on the mixing function stored in the RAM 36, and the transferred sound data is subjected to mixing processing. The sound data subjected to the mixing process is output from a digital output terminal 54 via the interface 52. The signal mixed into the two-channel stereo signal in the DSP 38 is converted into an analog signal by the D / A converter 48 and output from the analog output terminal 50. In the recording / playback mode, the signal of each track to be recorded and played back is sequentially time-divisionally processed.
The operation (writing / reading) of the RAMs 64 and 66 is switched in a time-division manner in accordance with the recording track or the reproduction track.

With respect to the metronome sound, waveform editing and generation are performed according to the procedure shown in FIG. When a song is designated (S1) and the corresponding song management data is read (S2), the recorder CPU 14 automatically sets the metronome sound included in the song management data based on the basic waveform data of the metronome sound in the flash ROM 58. In accordance with the waveform editing parameters described above, waveform editing calculation processing (pitch shift calculation and envelope processing) is performed using the DRAM 62 as a work area (S3, S4). In the pitch shift calculation, pitch-shifted waveform data is calculated by linear interpolation, Lagrange interpolation, or the like. In the envelope processing, for example, when there is an impression that the attack, release, etc. become longer due to a pitch shift and the impression is elongated, a calculation is performed by multiplying the envelope waveform by a coefficient corresponding to a fast rising and falling envelope waveform to make the envelope proper. Do. The metronome sound waveform data whose waveform has been edited by the waveform calculation processing is transferred from the DRAM 62 to a predetermined area of the SDRAMs 64 and 66 and stored (S5). In this state, when recording (ALL REC or the like) is instructed (S6), if the metronome sound reproduction is set to ON, the metronome stored in the SDRAMs 64 and 66 at the tempo designated by the operator. The waveform data of the sound is repeatedly read out and reproduced (S7, S8), and the recording of the performance is performed accordingly.

SDRAM 6 constituting buffer memory
Table 1 shows an example of division of areas 4, 66 during normal recording and reproduction in the recording / reproduction mode. (Table 1) Chip number Bank number Assigned channel number or channel name 0 0 0,2,4,6,8,10 0 1,1,3,5,7,9,11 0 2,12,14,16,18, 20, 22 0 13 13, 15, 17, 19, 21, 23 10 Metronome (first shot), Sampler 11 1 Sampler 12 Sampler 13 Sampler, Metronome (Second shot)

Chips 0 (one of SDRAMs 64 and 66) and 1 (the other of SDRAMs 64 and 66)
4 to 4 banks. On chip 0, channels 0 to 23 are assigned to regions of equal capacity for performance sounds. Adjacent channel numbers are assigned to different banks. Bank 0 of chip 1 is assigned the entire waveform of the first metronome sound in the bar and the area of the sampler. A sampler area is allocated to the entire banks 2 and 3. The entire area of the metronome sound waveform shared by the sampler and the second and subsequent measures of the bar is assigned to the bank 4. In the recording / playback mode, the sound data in the area of channels 0 to 23 for the performance sound is sequentially updated as the performance progresses.
Since the metronome sound and the sampler sound are read out repeatedly and used (the sampler sound is usually monophonic,
Each time a sound is instructed from the recorder CPU 14 based on the operation of the operator, the sound is repeatedly read. ) It is not updated in one song unless it is necessary. In other words, the metronome sound and sampler sound
Since the entire waveform data to be reproduced is stored in the M64 or M66, writing to the SDRAM 64 or 66 is not necessary during reproduction, and only reading from the SDRAM 64 or 66 is performed. The reading of the metronome sound and the sampler sound from the SDRAM 64 or 66 is performed by reproducing one sample for each sampling period 1 / fs (one sample for each type when a plurality of types of samplers are designated). The reading process of the sound data of the channel and the writing process of the sound data of the recording channel are performed in a time sharing manner. The sampler sound is recorded by the operator in advance of an arbitrary number of sampler sounds, and prior to recording by specifying the song in the recording / playback mode, the operator An arbitrary sampler sound is selected from among them (up to eight types can be selected), and the sound data of the corresponding sampler sound is read out from the HDD 60 and written to any channel (samplers 0 to 7) of the SDRAMs 64 and 66. Then, by instructing the sounding of a sampler of an arbitrary channel at an arbitrary timing after the start of recording by operating a button or the like, the corresponding sampler sound is sounded, and the sounding timing and sounding channel are recorded in the song management data. When the song is reproduced after the recording is completed, the corresponding sampler sound is read out from the SDRAMs 64 and 66 at the corresponding timing and is generated based on the song management data.

SDRAM 6 in recording / playback mode
An example of 4, 66 write / read control will be described. In the recording / playback mode, as shown in FIG. 6, the sampling period 1 / fs (fs = 48 kHz, 44.1 k
Hz) are divided into predetermined sections A and B. For the recording channel (input channel),
The sound data is written into the DRAM 64 or 66 by the number of recording channels in a time-division manner by one sample data, and in the section B, the sound data of a plurality of samples of the recording channel is read out from the SDRAM 64 or 66.
DMA transfer to D60 is performed. Regarding the reproduction channel (output channel), the SDRAM 6
From 4 or 66, the sound data is read out by the number of recording channels in a time-division manner by one sample data, and
The sound data of a plurality of samples of the reproduction channel is
60 and read to SDRAM 64 or 66
A is transferred and written. These DMA transfers are
When one cluster of samples is accumulated for each channel, the one cluster of samples is transferred collectively,
When the transfer of samples for one cluster for one channel is completed, another channel stored for one cluster is transferred collectively in the same manner, and is performed in a time division manner on a channel basis. For any channel, if there is no need to move data by DMA transfer, that is, if the input data from the input / output signal line has not been newly written in the SDRAMs 64 and 66 for one cluster, the data is transferred to the input / output signal line. Output data of S
If one cluster has not been newly read from the DRAMs 64 and 66, the DMA transfer is suspended. For metronome sound and sampler sound, see SDRAM6
Since the entire waveform data to be reproduced is stored in 4 or 66, writing to SDRAM 64 or 66 is not necessary during reproduction, and only reading from SDRAM 64 or 66 is performed. The reading of the metronome sound and the sampler sound from the SDRAM 64 or 66 is performed one sample at a time at a sampling period of 1 / fs (when a plurality of types of samplers are designated, one sample is taken for each type).
The processing is performed by time-division processing and reading processing of the sound data of the reproduction channel of the performance sound. Within section A for reading one sample of data of each channel from SDRAM 64 or 66 within section A within one sampling period 1 / fs, or writing data of one sample of each channel to SDRAM 64 or 66. SD
Table 2 shows an example of the time division order of the RAMs 64 and 66.
However, "R" of the operation mode in Table 2 is read,
“W” means write, and “R / W” means write or read, respectively. (Table 2) Order Operation mode Chip number Bank number Channel 1 R 0 0 0 2 R 0 1 1 3 R 10 Metronome (first shot) 4 R 0 0 25 R 0 1 36 R 1 3 Metronome (2 shots) 7 R 004 8 R 0 1 5 9 R 0 0 6 10 R 0 1 7 11 R / W 0 0 8 12 R / W 0 1 9 13 R / W 0 0 10 14 R / W 0 1 1 11 15 R / W 0 2 12 16 R / W 0 3 13 17 R / W 0 2 14 18 R / W 0 3 15 19 W 0 216 (MIXL upper word) 20 W 0 3 17 (MIXR upper word) 21 R 10-3 Sampler 0 22 W 0 218 23 W 0 319 24 R 10-3 Sampler 125 W 0 220 20 26 W 0 32 21 27 R 10 0-3 Sampler 228 W 0 222 29 W 0 3 23 30 10-3 Sampler 331 {W0216 (MIXL lower word)} 32 {W0317 (MIXR lower word)} 33R10-3 Sampler 434 R10-3 Sampler 535R10 ~ 3 Sampler 6 36 R 10 ~ 3 Sampler 7

In the example of Table 2, out of the 24 signal path channels, channels 0 to 7 are channels exclusively for reproduction, channels 8 to 15 are channels for recording and reproduction,
Channels 16 to 23 are set as recording-only channels. However, channels 8 to 15 are only for recording (ALL
REC) mode, and can be used as a recording channel only. Simultaneous playback and recording (SYNC DUBBIN)
In the mode G), it can be used only as a reproduction channel. When performing mixdown, the tracks of the mixdown original part are assigned using channels 0 to 15 as reproduction channels, and channels 16 and 15 are assigned.
17 is the mix-down destination recording channel MIXL, M
The sound reproduced on channels 0 to 15 is assigned as IXR (two channels on the left and right), mixed down to two channels on the left and right by the DSP 38, and recorded on the HDD 60 via the channels 16 and 17. When the mixdown signal recorded on the HDD 60 is reproduced, the left and right two-channel mixdown signals are assigned to any of the reproduction-dedicated channels 0 to 15 and reproduced. Since the mixdown signals MIXL and MIXR are composed of 24 bits, they are transmitted in the form of an upper word and a lower word, respectively.

The present invention can be applied to the generation of various tones such as repetitive sounds such as rhythm sounds and single sounds such as sampler sounds, in addition to metronome sounds. Further, the content of the waveform editing is not limited to the pitch adjustment, and can be applied to level adjustment and other arbitrary waveform editing. Further, the basic waveform data storage device is not limited to a flash ROM, but may be constituted by another nonvolatile memory or an HDD. Further, the edited waveform data storage device is not limited to the SDRAM, and may be constituted by another volatile memory or the like. In the above embodiment, the HDD is used as the external storage device. However, an optical disk device, a magneto-optical disk device, or another external storage device may be used. Further, in the above embodiment, the case where the present invention is applied to a recording / reproducing device having a built-in external storage device has been described. However, the present invention is also applicable to a recording / reproducing device having an external storage device externally attached. it can. In the above embodiment, the case where the present invention is applied to a digital mixing recorder is described. However, the present invention can be applied to a digital recorder without a mixing function and other recording / reproducing devices. Further, the present invention is not limited to a recording / reproducing apparatus, but can be applied to an electronic musical instrument and other musical sound generating apparatuses.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention, in which a part related to the present invention is extracted and shown in a system configuration of the entire hard disk recorder of FIG. 3;

FIG. 2 is a block diagram showing a system configuration of a conventional metronome sound generator.

FIG. 3 is a block diagram showing a system configuration of a main part of the entire hard disk recorder to which the present invention is applied.

FIG. 4 is a diagram illustrating an example of division of an address area of the HDD 60 in FIG. 3;

FIG. 5 is a flowchart showing a procedure for editing and generating a waveform of a metronome sound in the hard disk recorder of FIG. 3;

6 is a time chart showing an example of divided SDRAM write / read processing within a sampling period in a recording / playback mode in the hard disk recorder of FIG. 3;

[Explanation of symbols]

10: Hard disk recorder (recording / reproducing device), 14
... Recorder CPU (waveform editing / calculation unit, memory control unit)
58: Flash ROM (basic waveform data storage device)
60 ... HDD (external storage device), 64, 66 ... SDRA
M (buffer memory, edited waveform data storage device), 68
... DRC (memory control unit)

Claims (6)

[Claims] 1. A basic waveform data storage device for storing basic waveform data of a musical tone, and the basic waveform data is read from the basic waveform data storage device, and an appropriate waveform editing parameter is read in accordance with a predetermined waveform editing calculation program. A waveform editing operation unit that performs a waveform editing operation according to the following; an edited waveform data storage device that stores the waveform data of the waveform-edited tone; and a waveform editing device that stores the waveform-edited tone data from the edited waveform data storage device. A tone generator comprising: a memory controller that reads data at an appropriate sampling period. 2. The tone generator according to claim 1, wherein said waveform editing parameters include a parameter indicating one or both of a pitch shift amount and an envelope waveform of said tone. 3. An externally input sound data is recorded in an external storage device via a buffer memory, and the sound data recorded in the external storage device is read out and output to the outside via the buffer memory. In the configured recording / reproducing device, a basic waveform data storage device storing basic waveform data of a musical tone, and the basic waveform data are read out from the basic waveform data storage device, and are appropriately read in accordance with a predetermined waveform editing calculation program. A waveform editing operation unit for performing a waveform editing operation according to a waveform editing parameter; storing the waveform data of the waveform-edited musical sound in a partial area of the buffer memory; and storing the sound data in another area of the buffer memory. While recording or playing back, the waveform data of the musical tone stored in the buffer memory is synchronized with the recording or playing back. Recording and reproducing apparatus comprising; and a memory control section for reading out and reproducing a time-division and writing and reading the sound data to the memory. 4. An externally input sound data of a plurality of channels is written in an area allocated to each channel in a buffer memory in a time-division manner, read out in a time-division manner, and recorded in an external storage device. The sound data of a plurality of channels recorded in the buffer memory is read out in a time-division manner and written to the individually allocated area of the buffer memory in a time-division manner, and can be read out in a time-division manner and output to the outside. Writing and reading of sound data to and from the buffer memory for reproduction and writing and reading of sound data to and from the buffer memory for recording of one or more different channels can be performed in a time-division manner in parallel. A basic waveform data storage device for storing basic waveform data of musical sounds A waveform editing operation unit that reads the basic waveform data from the basic waveform data storage device and performs a waveform editing operation according to an appropriate waveform editing parameter in accordance with a predetermined waveform editing operation program; Storing tone waveform data in an area of the buffer memory different from the area to which the plurality of channels are assigned, and recording or reproducing the sound data of the plurality of channels through the individually assigned area of the buffer memory; While synchronizing with the recording or playback,
A memory control unit for reading and reproducing the waveform data of the musical tone stored in the another area of the buffer memory in a time-division manner with writing and reading of the sound data to and from the buffer memory, and reproducing the recorded data. apparatus. 5. The waveform editing parameter can be appropriately set according to a user's operation, and the set waveform editing parameter is stored in the external storage device according to a designation of a song to be recorded or reproduced. 5. The recording / reproducing apparatus according to claim 4, wherein a corresponding waveform editing parameter is read from the external storage device, and the waveform editing operation is performed according to the waveform editing parameter. 6. The recording / reproducing apparatus according to claim 3, wherein the waveform editing parameters include a parameter indicating one or both of a pitch shift amount and an envelope waveform of the musical tone.