JP2009180891A - Electronic musical device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set and modify the tempo of an inside clock by a user when not receiving a tempo clock from the outside even when setting a synchronous mode (MIDI Sync) in an auto mode in an electronic musical device having a tempo synchronous function. <P>SOLUTION: The electronic musical device includes a means for inputting first synchronous information (External Clock) generated in outside equipment and a means for generating second synchronous information (Internal Clock) in a self equipment inside, for generating a musical sound at the tempo based on selected synchronous information having selecting the first synchronous information when the first synchronous information from the outside equipment inputs and selecting the second synchronous information when it does not input. The cycle of the second synchronous information is modified to modify the tempo when the second synchronous information is selected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic music apparatus and a program that operate by inputting a synchronization signal such as a MIDI clock.

Conventionally, an electronic music apparatus such as an electronic musical instrument having an automatic performance function is known. The automatic performance function uses a tempo clock (for example, F8 signal of MIDI clock) to synchronize the tempo. The tempo clock may be input from an external MIDI device connected to the device, or an internal clock may be generated and used. Some have an auto mode as described in Non-Patent Document 1 below. The auto mode means that if a MIDI clock is input from an external MIDI device, the internal clock will not operate, but will operate from an external MIDI clock. If an external MIDI clock is not input, the external MIDI device will In this mode, the internal clock automatically operates at the last set tempo.
"MOTIF XS 6 / MOTIF XS 7 / MOTIF XS 8 Instruction Manual", Yamaha Corporation, 2007, p268

  In the above-described auto mode, the user cannot set the tempo (set the MIDI clock cycle) regardless of whether or not a MIDI clock is received from an external device. For this reason, inconvenience occurs when it is desired to edit automatic performance data. For example, if you synchronize with an external sequencer and generate an arpeggio with your own automatic performance function, you can use the MIDI clock from the external sequencer in auto mode, but check the arpeggio at a slower tempo. You may want to edit. In that case, after stopping the external sequencer and switching to a mode that operates with its own internal clock, slow down the internal clock tempo, perform various editing operations, switch back to auto mode and synchronize with the external sequencer, It was necessary to follow the procedure, and the operation was complicated. Or, if you want to try out the arpeggio sound generated by your own automatic performance function at various tempos, stop the external sequencer, change the tempo variously with your internal clock, and use the external sequencer with the tempo The operation is complicated because the tempo is set and the synchronization with the sequencer is performed again.

  An object of the present invention is to allow a user to change the tempo when a tempo clock is not received even when the synchronization mode (MIDI Sync) is set to the auto mode.

  In order to achieve the above object, the present invention includes means for inputting first synchronization information (External Clock) generated in an external device, and means for generating second synchronization information (Internal Clock) inside the device. If the first synchronization information is input from the external device, the first synchronization information is selected. If not, the second synchronization information is selected, and a musical tone is generated at a tempo based on the selection. As such, when the second synchronization information is selected, the tempo can be changed by changing the period of the second synchronization information.

  According to the present invention, even when MIDI Sync is set to the auto mode, for example, the user can change the tempo when no MIDI clock is received from the outside. This allows you to stop the external sequencer and change the tempo with your internal clock in various ways if you want to change the tempo and make various checks even when you are operating the unit in auto mode with a MIDI clock from an external sequencer. Thus, the confirmation work is performed, and then the external sequencer is operated again, so that the operation is easy.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a hardware configuration of an electronic music apparatus according to an embodiment of the present invention. Here, the description will be given with an electronic musical instrument having a performance operator such as a keyboard and a sound source, but the present invention has a function of generating musical sounds in synchronization with a tempo clock input from an external device and an internally generated tempo clock. Any music apparatus can be applied.

  In FIG. 1, a CPU 101 is a processing device that controls the operation of the entire electronic musical instrument. The timer 102 is a timer for measuring a predetermined time. The ROM 103 is a non-volatile memory that stores a startup routine at power-on, a BIOS (BASIC INPUT / OUTPUT SYSTEM) that manages low-level I / O processing, and the like. The RAM 104 is a volatile memory used as a load area for programs executed by the CPU 101 and various work areas. The external storage device 105 is a storage medium of various types such as a magnetic recording medium such as a hard disk or a flexible disk, or an optical storage medium such as a CD-ROM or DVD. The MIDI interface 106 is a MIDI standard interface for connecting to various external MIDI devices 107. The communication I / F 108 is an interface for connecting to an external server computer 110 or the like via the communication network 109. The performance operator 112 is an operator such as a keyboard for a user to perform a performance operation. The operation of the performance operator 112 is detected by the detection circuit 111 and the detection result is sent to the CPU 101. The setting operation element 114 is an operation element such as a switch, button, or knob for the user to operate. The operation of the setting operator 114 is detected by the detection circuit 113, and the detection result is sent to the CPU 101. The display 116 is a display device that displays various types of information. The display circuit 115 displays the given data on the display 116 based on an instruction from the CPU 101. The tone generator circuit 117 generates a musical sound based on an instruction from the CPU 101. The effect circuit 118 gives various effects to the musical sound generated by the sound source circuit 117. The musical sound output from the effect circuit 118 is emitted by the sound system 119. Reference numeral 120 denotes a bus line that interconnects these components.

  The electronic musical instrument of FIG. 1 has an automatic performance function, and can be set to the auto mode by a predetermined operator of the setting operator 114. In the auto mode, the MIDI clock input from an external device (MIDI device 107 in FIG. 1) operates as a tempo clock. If the MIDI clock from the external device is not input, it is automatically generated in the own device. The internal clock is operated as a tempo clock. At that time, the user can change the tempo of the internal clock.

  FIG. 2 is a schematic diagram showing how the tempo is switched when the auto mode is set in the electronic musical instrument of FIG. An arrow 201 indicates the passage of time, and arrows such as 211, 212, 214, and 215 indicate the input timing of a MIDI clock (MIDI Timing Clock) input from the external MIDI device 107 to the apparatus of FIG. 202 is a time chart showing whether the apparatus of FIG. 1 operates using an external clock or an internal clock, and 203 is a time chart showing a tempo value. External 202 indicates that an external clock (a MIDI clock input from the external MIDI device 107) is used as a reference as a reference timing signal for acquiring a tempo. Internal indicates that the internal clock is used as a reference.

  Since the auto mode is set, when an external clock is input as shown in the external device 107 to 211, the external clock is used as a clock source and the tempo is calculated. Here, a tempo of 120 bpm is calculated based on the time between clocks (about 21 msec), and the process proceeds at the tempo. Assume that the external MIDI clock is interrupted at the timing of the arrow 212. At this time, in this apparatus, for the time being, the clock source is an external clock and the tempo is kept at 120 bpm for a predetermined time (in this case, 3 seconds), and after 3 seconds from the interrupted timing 212, the clock source is changed to the internal clock. Switch. Immediately after switching to the internal clock, the previous tempo value is inherited and remains at 120 bpm, so processing proceeds at that tempo. Thereafter, for example, if the user operates the knob (setting operation element 114 in FIG. 1) to lower the tempo at the timing 213 and lowers the tempo to 100 bpm, the processing proceeds at the tempo of 100 bpm with the internal clock. Assume that the input of the MIDI clock from the external device 107 is resumed at the timing of the arrow 214. Since the auto mode is set, the clock source automatically switches to the external clock. Further, when the number of external clocks enough to calculate the tempo is input (here, clocks indicated by arrows 214 and 215), the tempo is calculated, and here the processing proceeds with a tempo of 120 bpm.

  FIG. 3 shows the overall processing flow in the auto mode in the apparatus of FIG. When the auto mode is set by a predetermined operation, first, initial setting (301) is performed. In this initial setting, the clock source is set to the external clock. As the tempo value, the value immediately before entering the process of FIG. 3 remains, and the timer 102 has already been started. Next, it is determined whether the clock source is set to the internal clock (302). If so, the internal process (303) is performed. If the clock source is set to the external clock, the external process (304) is performed. Do. Next, as other processing (305), general processing as a musical instrument is performed, such as generation of musical tone according to the user's operation of the performance operator, change of timbre setting, and automatic performance setting. It is determined whether a transition operation to a mode other than the auto mode has been performed (306). When the auto mode is maintained, the process returns to step 302, and when the mode is shifted to a mode other than the auto mode, the process is terminated. The processing corresponding to the transition operation is performed after exiting the processing of FIG. Although not shown, the timer 102 is set to be interrupted according to the set tempo value, and a timer interrupt corresponding to the tempo value is generated. By the timer interruption process, for example, a musical tone generation process based on automatic performance data is executed.

  FIG. 4A is a flowchart of the internal process in step 303. First, it is determined whether an operation member for changing the tempo provided as the setting operation member 114 in the apparatus of FIG. 1 has been operated (401). If the tempo change operation has been performed, the tempo value is recalculated based on the operation (402), the recalculated tempo value is displayed on the display 116 (403), and the interrupt setting of the timer 102 is set according to the tempo value. Update (404). As a result, the tone generation process is performed by the timer interrupt process with the setting corresponding to the new tempo value. Next, it is determined whether a MIDI clock has been received from the external device 107 (405). When received, the buffer is cleared and initialized, the current time is obtained from the timer 102 and newly accumulated in the buffer (406), the clock source is set as the external clock (407), and the tempo display on the display 116 is changed to “ "-" (408), and the process ends. In step 408, only the tempo display is changed, and the setting of the tempo value remains unchanged. The buffer is a ring buffer provided in the RAM 104, for example, and has a sufficient size to store time information necessary for calculating a tempo value from an external clock.

  FIG. 4B is an external process flow in step 304. First, it is determined whether a MIDI clock transmitted from the external device 107 has been received (411). If it is received, the current time is acquired from the timer 102 and accumulated in the buffer (412), and it is determined whether or not the amount necessary for calculating the tempo value (here, the past two times) is accumulated in the buffer ( 413). If so, the tempo value is recalculated (414), the interrupt setting of the timer 102 is updated according to the tempo value (415), and the process proceeds to step 416. If it is determined in step 413 that the data necessary for calculation is not yet stored in the buffer, the process directly proceeds to step 416. Next, the current time is acquired from the timer 102 (416), and it is determined whether or not a predetermined time (here, 3 seconds) has elapsed since the time last loaded in the buffer (417). If it has elapsed, the clock source is set as the internal clock (418), the tempo value is displayed on the display 116 (419), and the process is terminated.

  With the above processing, the operation described in FIG. 2 is realized.

  Examples of tone generation according to tempo include, for example, arpeggio generation, song playback, accompaniment pattern performance, and application of effects using an LFO synchronized with the tempo. In the above-described embodiment, an example in which a MIDI clock is used as synchronization information has been described. However, the present invention is not limited to this. In the above embodiment, the electronic musical instrument has been described as an example. However, the form may be a personal computer + application software, and may be applied to a karaoke device, a game device, an automatic performance piano, or the like.

  In the above embodiment, the knob is exemplified as the setting operator 114 for the user to operate the tempo. However, a slide volume type operator or a switch group for inputting numerical values may be used. Alternatively, an operation element may be displayed on the display in software and the software operation element may be operated using the operation element as a pointing device. Further, the user is not limited to setting the value directly, but the time interval at which the user taps the operation element may be detected and the tempo may be calculated from the time interval.

  In the above embodiment, when calculating the tempo value from the external clock, the tempo is obtained from the time difference of the past two times, but this is not restrictive. The tempo value may be calculated by some calculation such as linear prediction from a plurality of data of the past three or more times.

The block diagram which shows the hardware constitutions of the electronic music apparatus of embodiment Schematic showing how the tempo is switched Flow chart showing the overall processing flow in auto mode Flow chart of internal processing and external processing

Explanation of symbols

  101 ... CPU, 102 ... timer, 103 ... ROM, 104 ... RAM, 105 ... external storage device, 106 ... MIDI interface, 107 ... MIDI equipment, 108 ... communication I / F, 109 ... communication network, 112 ... performance operator, 114: setting operation element, 116: display, 117 ... sound source circuit, 118 ... effect circuit, 119 ... sound system, 120 ... bus line, 211, 212, 214, 215 ... MIDI clock input timing, 213 ... knob for lowering tempo Operation timing, 202... Clock source, 203.

Claims (2)

Means for inputting first synchronization information generated in the external device;
Means for generating second synchronization information inside the device;
Means for detecting whether the first synchronization information is input;
Means for selecting the first synchronization information if the first synchronization information is input; otherwise, selecting the second synchronization information;
Means for generating a musical tone at a tempo based on the selected synchronization information;
An electronic music apparatus comprising: means for changing a period of the second synchronization information when the second synchronization information is selected. A program for realizing an electronic music device that generates musical sounds,
Computer
Means for inputting first synchronization information generated in the external device;
Means for generating second synchronization information inside the device;
Means for detecting whether the first synchronization information is input;
Means for selecting the first synchronization information if the first synchronization information is input; otherwise, selecting the second synchronization information;
Means for generating a musical tone at a tempo based on the selected synchronization information;
When the second synchronization information is selected, the program is made to function as an electronic music device comprising means for changing the period of the second synchronization information.

Images