JPH04171492A - Musical interval converter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pitch conversion device such as MIDI, which is one of the communication systems for electronic musical instruments.

[Prior art] Conventionally, MID, which is a unified standard for communication procedures for electronic musical instruments,
I (Musical Instrument Di
An electronic musical instrument, such as a keyboard, which is compatible with the Digital Inter4ace) is configured to output, when a key is operated, an event data signal including operation code data representing the operation of each key. When this event data signal is received by another musical instrument, that instrument produces the same sound as the operation represented by the data based on the operation code data contained in the event data signal.

This event data includes command data that identifies the command to be executed when received, and can be identified as event data of several types of commands. Among these, data that includes note number data that identifies a pitch and gives a command to produce or mute a note of that pitch is called note event data.

Also, when the receiver outputs the event data it has received, it adds or subtracts a certain value to the note number data included in this event data to change the pitch.
Modulation can be performed without changing the tempo of the song.

This event data includes channel data that identifies the channel. This channel data distinguishes which instrument each event data belongs to.

Therefore, even if event data signals for the performance of multiple musical instruments are transmitted through a single signal cable, the musical instruments can distinguish whether the event data is for their own sound, and allow each instrument to perform different performances at the same time. I can do it.

This means that by switching channels on the keyboard, overlappingly recording multiple channels of performance information on a recording device, and then playing back that data, you can distinguish between multiple electronic musical instruments and play them simultaneously using one keyboard. It means that it is possible.

[Problems to be Solved by the Invention] However, some note event data assign different percussion instrument sounds to note numbers, such as drum data, instead of assigning pitches to note numbers. If the note number of such note event data is pitch-converted in the same way as other note event data, the allocation of percussion instrument sounds will be distorted, resulting in completely meaningless data. In other words, there was a problem in that the event data of a song including percussion instrument data could not be modulated.

The present invention has been made in order to solve the above-mentioned problems, and by preventing pitch conversion of the note event data of a preset channel among the note event data of the received event data. An object of the present invention is to provide a pitch conversion device capable of modulating event data of a song including note event data to which elements other than pitch are assigned to note number data.

[Means for Solving the Problems] To achieve this object, the pitch conversion device of the present invention is a data conversion device that performs conversion processing on event data used for electronic musical instrument control, as illustrated in FIG. and includes note number data for identifying pitches, note event data for instructing to produce or mute notes of the pitches, channel data for identifying channels, and operation data for operating the musical instrument. a storage means for storing event data including; a non-conversion channel setting means for setting a channel in which data is not converted; a modulation data setting means for converting the pitch of the note number data; note event data detection means for detecting note event data from among the data; identifying the channel data from the event data and detecting event data of a channel different from the channel set by the non-conversion channel setting means; a channel detection means, the note event data detection means, and a conversion means for converting note number data included in the note event data detected by the channel detection means based on the modulation data set by the modulation data setting means. It is characterized by being equipped.

[Operation] When the pitch conversion device of the present invention having the above configuration receives event data, the storage means temporarily stores the event data, and the note event data detection means detects the note event data. Then, the channel detection means detects channel data for identifying the channel from among the note event data detected by the note event detection means and note event data of a channel different from the channel set by the non-conversion channel setting means. . Then, the note number data included in the note event data is converted based on the modulation data set by the modulation data setting means from among the note event data detected by the conversion means or the channel detection means.

Additionally, after the channel detection means detects channel data other than non-converted channels from the received event data, the note event data detection means may detect note event data from the data detected by the note event data detection means. .

[Example] Hereinafter, a first example of the present invention will be described with reference to the drawings.

FIG. 2 shows a MIDI sequencer 1 as an example,
This MIDI sequencer 1 includes a floppy disk unit 3, a liquid crystal display (LCD) 5, and function keys 7.
and a shift key 9. The floppy disk unit 3 is a device that records and stores performance information including event data and its time data on a floppy disk as a recording medium according to recording needs, and also plays back the recorded performance information. It is. A floppy disk is inserted into the insertion slot 3a to be set for storage and playback. It is also provided with an access lamp 3b indicating that storage/reproduction is in progress and an eject button 3C for ejecting the floppy disk.

This MIDI sequencer 1 has a keyboard 11 and MIDI
It is connected by a D I signal cable 13.15, and is a device that receives event data from the keyboard 11 and stores it as performance information together with the time it is counting, and also stores events included in the stored performance information. This is a device that outputs data to the keyboard 11 and other musical instruments at the timing of the time stored as a pair with the event data, and causes them to sound simultaneously.

Note that the keyboard 11 once inputs event data from the MIDI sequencer 1 and then distributes it to other musical instruments via the through terminal TR. Of course, the MIDI signal cable 13.15 can be extended to connect to other musical instruments, each different.

Therefore, it is possible to obtain event data from a plurality of musical instruments and record it together with time as performance information, or to output event data to a plurality of other musical instruments according to the time and cause them to produce sound.

As shown in Figure 5, the event data consists of 3 bytes per 1
It consists of data that is used as a unit.

Also, if the first byte data B1 is the same continuously, the second byte data B1 is the same.
Two bytes of byte data B2 and third byte data B3 may be used as one unit. Actually, a start bit and a stop bit are added to each byte, but they are omitted here.

The first byte data B1 is the most significant seventh bit B1-7
is "1", indicating that it is a status byte, and the second and third byte data B2. B3 is the seventh bit B2-7. B5-7 being "0" indicates data bytes B2 and B3.

Status byte B1 indicates the type of status using 3 bits from 6th bit B1-6 to 4th bit 81-4, and indicates the channel using 4 bits from 3rd bit B1-3 to 0th bit Bl-0. ing. That is, eight types of status can be distinguished from status byte B1, and 16 types of channels can be distinguished. As for the status, r
oooJ (binary number) represents note-off, and roolJ represents note-on. Other statuses include polyphonic key pressure, control change, and program change. Also, the channel is r
o 000J~rllllJ (binary numbers) represent channels "1"~r16J (decimal numbers).

For example, the bit of status byte B1 is “10010
If it is 000J, the status type is "note on"
and its channel is "1". And the data byte B2 immediately after that is 128 in "note on"
Data byte B3 indicates one of its 128 types of velocity (intensity).

The sixth bit B1-6 to the fourth bit B1-4 of this hide data B1 correspond to command data for identifying whether or not it is note event data, and the third bit B1-6 of this hide data B1 corresponds to command data for identifying whether it is note event data.
Bit B]-3 to Oth bit B1-0 correspond to channel data for identifying the channel, and byte data B2. The lower 7 bits of each of B3 (6th bit B2-6
~Oth bit B2-0. The 6th bit B5-6 to the 0th pin (B3-0) corresponds to operation data for operating the musical instrument. Note event data is data in which the sixth bit B1-6 to the fourth bit B1-4 of the status byte B1 are r.
In the case of oooJ or roolJ, data byte B2 at that time is note number data.

Here, the note number data is expressed in 7 bits as described above, and 128 types of pitches from 0 to 127 can be identified. 0 is the lowest pitch, and as the number increases by 1, the pitch increases by a semitone, and 127 is the highest pitch. Increasing the number by 1 means raising the pitch by a semitone, so if the number increases by 12, the pitch will go up by 6 steps, which means the pitch will go up by 1 octave. Conversely, if the number is decreased by 12, the pitch will be one octave lower.

Next, the control g position of this embodiment will be explained with reference to the block diagram of the No. E processing system shown in FIG.

The MIDI sequencer 1 includes a CPU 1a, a ROM 1b, and a R
AM1c and Thailand? -1d, and is configured as a digital computer.

Furthermore, it is provided with a floppy disk controller 1e for driving and controlling the floppy disk unit 3, and an LCD controller 1f for driving and controlling the LCD'5. Yes
2. It also has an interface 1g that can input/output sequential event data and an input/output interface 1h from keys 7.9. Various signals are transmitted between these via a lotus line 11.

On the other hand, keyboard 1] also has CPLI code] a, ROM
It is equipped with an I 1b SRAM I 1 c and a timer 116, and is configured as a digital computer. It also includes a sound source 11e that converts digital event data into an analog audio signal, an amplifier llf that amplifies the audio signal, and a speaker 11g that produces sound. Furthermore, an interface ll for key 11h
It also has an interface llj that can input and output i and sequential event data. Various signals are transmitted between these through a path line llk.

Next, among the processes executed by the CPU 1a of the MIDI sequencer 1, the pitch conversion process will be explained based on the flowchart shown in FIG.

First, when the processing of the MIDI sequencer 1 is started, it is determined whether the modulation data setting mode is currently set (Sll). At this time, function key 7
If the modulation data setting mode is set by the selection operation using the shift key 9, the modulation data setting process is started (S12), and the modulation data can be selected by operating the function key 7. For example, "+1
2", 12 is added to the note number data that identifies the pitch in the note event data, and the pitch is converted. Furthermore, if modulation data is not set, all note event data will not be converted in any way.

Next, if the determination result of Sll is No, it is determined whether or not it is the non-conversion channel setting mode (51 B). At this time, if the non-conversion channel setting mode is set by the selection operation using the function key 7 and the shift key 9, the setting process for the non-conversion channel is started (S4), and the non-conversion channel setting mode is set by the selection operation using the function key 7. Channel selection becomes possible. For example, "16"
If this is set, the pitch of the channel data for identifying the channel in the event data or the 16 event data will not be converted in pitch even if the note event data is included. Furthermore, if no non-conversion channels are set, the note data of all channels will be pitch-converted.

If the determination result in step 512 is No, it is determined whether or not the playback mode is for transmitting event data in RAMJC (S15). At this time, function key 7
If the playback mode is set by the operation, it is then determined whether to send data or end (S16). In other words, if the cancellation of the playback mode is supported by the operation of the function key 7 (S15, No), or if all data transmission is completed (S16, YES),
Waiting for key personnel at 517. Then, when the key is manually operated, the process moves to the Sll.

Further, if the determination result at 516 is No, it is determined whether the event data to be transmitted is note event data (318). In the case of event data or note event data, it is determined whether pitch conversion has been set, that is, whether modulation data has been set in step 512 (S19). If pitch conversion is set, the channel data (Bl-3 to Bl-3) of the event data to be sent
1-0) and the non-converted channel set in step 814, and if they do not match, the process proceeds to the next step S2]. Also, if the non-conversion channel is not set, 821
Proceed to.

In S21, the modulation data set in 812 is added to the note number data (B2-6 to B2-0) of the note event data. For example, if the note number data before conversion is r64J (decimal) and the modulation data is r+12, as shown in Figure 5, the note number data after conversion will be ``76'' as shown in Figure 6, and before conversion. Compared to , the note number is one octave higher.

If the converted result is less than 0, or 1
If the value is larger than 27, it becomes 0 or 127, respectively, and the value must fall between 0 and 127.

Subsequently, the data is output to the keyboard 11 etc. via the MIDI signal cable 3 (522).

Then, the process returns to step 516 again, and if the data transmission has not been completed, steps 518 to S22 are repeated in the same way.
Return to 17.

In addition, the above 518. If the judgment result in S19 is No, or if the judgment result in S20 is YES, S
22.

In this way, by setting the channel of the instrument whose note number data is assigned a value other than pitch using the non-conversion channel setting means, you can set the channel of the instrument whose note number data is assigned to a value other than the pitch, and the event of a song that contains pitch conversion or unnecessary note event data. Data can also be freely modulated.

Next, the seventh section regarding the pitch converter 21 as another embodiment will be explained.
This will be explained with reference to the figures.

The difference between the present pitch converter 21 and the MIDI sequencer 1 of the first embodiment is that the second embodiment does not have a storage function or a floppy disk unit. Therefore, by operating the keys 25 while observing the liquid crystal display section (LCD 23), the modulation data and non-conversion channels can be set. As a result, if this converter 21 is attached to a MIDI signal cable between two musical instruments, the note event data of a predetermined instrument input from the input side MIDI signal cable 27 can be transferred to a channel different from the non-converted channel. Note event data is converted based on only the modulation data, and the output side MID is immediately converted.
It can be output from the I signal cable 29 to other musical instruments.

Therefore, event data of a song that includes event data in which an element other than pitch is assigned to note number data in the note event data can also be modulated.

Here, CPUI a and RAMI C correspond to non-conversion channel setting means and modulation data setting means, and RAMI C corresponds to non-conversion channel setting means and modulation data setting means.
It corresponds to the buffer or storage means set in C, and the CP
U1a and ROM1b correspond to note event data detection means, channel detection means, and conversion means.

CPU stored in ROM 1b]a or the process of S18 or the process as a note event data detection means, 5
20 processing or processing as a channel detection means, 521
This corresponds to the processing of 1 or 1 stage of conversion, respectively.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, note event data included in event data is detected, and a channel included in the detected note event data is identified. Compare the channel data for the conversion with the non-conversion channel set in advance, detect note event data of a channel different from the non-conversion channel, and use the preset modulation data only for that note event data. Since pitch conversion is performed using the modulation method, it is possible to perform modulation even on event data of a song that includes note event data in which elements other than pitch are assigned to note number data such as drum data.

[Brief explanation of drawings]

FIG. 1 is a basic illustration of the present invention, FIG. 2 is a schematic configuration diagram showing the configuration of the MID1 sequencer of the first embodiment and the connection state with a keyboard and other musical instruments, FIG. 3 is a block diagram thereof, and FIG. The figure is a flowchart of the pitch conversion process performed by the MIDI sequencer, Figure 5 is a diagram explaining the structure of event data, Figure 6 is a diagram explaining the structure of event data after pitch conversion, and Figure 7 is the channel of the second embodiment. It is an external view of a converter. In the figure, 1 is a MIDI sequencer, and 1a is a CPU. ] b is ROM, lc is RAM, 11 is keyboard, 21
is a channel converter, and B1 to B3 are byte data (operation code data and identification code data).

Claims (1)

[Scope of Claims] 1. A data conversion device that performs conversion processing on event data used for controlling an electronic musical instrument, which includes note number data for identifying pitches, and includes instructions to produce or mute the notes of the pitches. storage means for storing event data including note event data for performing data conversion, channel data for identifying channels, and operation data for operating the instrument; and for setting channels for which data conversion is not performed. non-conversion channel setting means for converting the pitch of the note number data; modulation data setting means for converting the pitch of the note number data; note event data detection means for detecting note event data from the event data; channel detection means for identifying channel data and detecting event data of a channel different from the channel set by the non-conversion channel setting means, the note event data detection means and the note event data detected by the channel detection means; A pitch conversion device comprising: conversion means for converting note number data set by the modulation data setting means.