JP2562260B2 - Electronic musical instrument assigner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument capable of simultaneously playing a plurality of parts each having a different tone color, and more specifically, newly input by pressing a key or the like. The present invention relates to an assigner of an electronic musical instrument that selects a tone generation channel to be assigned to performance data. Electronic musical instruments generally have a plurality of musical tone generation channels (hereinafter, also simply referred to as channels), and when a musical tone is to be sounded by a new key depression or the like, the newly input musical tone is played. A channel to be assigned to data is selected from the plurality of channels. There are various methods for selecting this channel. For example, a channel that starts sounding earliest, which is selected from among available channels,
That is, there is a method of selecting a channel corresponding to the musical tone which is pressed the earliest, a channel corresponding to the musical tone which is released the earliest, a channel having the smallest sound generation amount, a combination thereof and the like. There is a so-called multi-timbre electronic musical instrument which can simultaneously play a plurality of parts each having a different tone color, and for example, an automatic performance device stores performance information of a plurality of parts and sequentially reads out this information to determine a predetermined value. Perform at the same tempo. In this type of electronic musical instrument, since the number of channels that can be sounded at the same time is finite, the number of channels that can be exclusively used by each part is fixed for each part before starting playing. Have been assigned. For example, if the total number of channels is "16", the number of channels for each part is piano "8", strings "5", flute "1", trumpet "1", bass "1". Fixed allocation is set.
This determines the number of tones that can be sounded simultaneously in each part. However, in this method, since the number of channels that can be used by each part is fixed, the number of channels that can be used is fixed only within the specified number of channels. You will not be able to use it.
For this reason, for example, when a certain key is pressed continuously and the number of channels used by that part reaches the upper limit value set for that part, other channels may not be used. Regardless, no more channels can be selected for that part anymore, which tends to make the performance monotonous and impairs the richness of performance expression. The present invention has been made in order to solve the above problems, and it is an object of the present invention to prevent the number of usable channels of each part from being fixed so as not to impair the richness of performance expression. To aim. In order to solve the above problems, the assigner of the electronic musical instrument according to the present invention has one form.
As an example, multiple musical tone generation channels are used to
In an electronic musical instrument that plays a musical instrument,
When the performance data for playing one is newly input
Tone generation channel to which the new performance data is assigned each time
Which is an assigner for selecting a plurality of parts,
Storage means for storing the priority order of each part, and
Select the tone generation channel to which performance data is assigned
To generate a musical tone, to which the new performance data is assigned
If there are not enough channels, it will be stored in the storage means.
Based on the priority of the part
From the tone generation channel to which the
And a selecting means for selecting. In addition, the electronic according to the present invention
In another form, the instrument assigner is a musical tone generator.
For electronic musical instruments that perform multiple parts using channels
In order to play one of the parts.
When new data is input, the new performance data is
It is an assigner that selects the tone generation channel to be applied.
Stores the priority of each part for the plurality of parts.
Storage means and musical tone to which the new performance data is assigned
When selecting the generation channel, the new performance data
If there are not enough musical sound generation channels to allocate
Is based on the priority of the part stored in the storage means.
The parts with the lowest priority order in order.
Assigned among the tone generation channels used in the part
Search for possible tone generation channels,
If so, a selector for selecting the assignable tone generation channels
And a step. [0009] By using a plurality of tone generation channels, a plurality of parts
In the case of performing
Pre-fix a predetermined number of musical sound generation channels for parts
Assigned to each part, and when playing each part, that part
Channels that exceed the specified number assigned to
Is not required, and is necessary for playing that part.
If the number of tone generation channels does not reach the above specified number,
Even if the difference is the number of difference tone generation channels of other parts
I haven't even used it for playing. Because of this,
Raw channels are not being used efficiently
It was Therefore, in the electronic musical instrument assigner according to the present invention,
Specify the number of tone generation channels used for playing the part for each par.
Instead of assigning a fixed number to
The above fixed allocation is stopped, priority is given to each part, and the tone generation channel to be assigned to new performance data is selected from the tone generation channel in the empty state. If you need to start from a channel etc. , use it in a part with a lower priority
The sound generation channels are selected in order. Thus part of the performance data belongs newly inputted is made without being limited to the tone generating channel number that can be used for a fixed number. In making this selection, the lower priority
The music used in the part of interest
Assignable tone generation channels among the tone generation channels
Tone generation channel that can be assigned by searching for
If there is a song, assign new performance data to it
If this is set to
As a channel, a number of musical tone generating channels
You can also leave it, etc., which enriches the performance expression
Become. FIG. 1 is a block diagram showing an electronic musical instrument provided with an assigner as an embodiment of the present invention. The performance data generator 1 is a device also called a music sequencer, which stores performance information for each part created by using a keyboard or a computer, and sequentially reads this to generate performance data. A format according to the MIDI standard is used for performance data generated by the performance data generator 1. When the MIDI standard is used, performance data of a plurality of parts can be transmitted and received by assigning different MIDI channels to each part. For example, a piano sound is assigned as MIDI channel 1 and strings are assigned as MIDI channel 2, and performance data is identified by this MIDI channel and transmitted / received. The channel assigner 2 receives this MIDI performance data, refers to the memory 3 according to the part corresponding to this MIDI channel, selects a required channel to be assigned to the performance data, and selects the selected data and The tone generator 4 is controlled based on the performance data. The tone generation device 4 is a device having 24 channels for tone generation, and various tone generation systems can be used. In recent years, the tone generation circuit has been digitized, and a waveform reading method, a frequency modulation method, a phase distortion method, and the like have been put into practical use. Furthermore, by combining these methods, a richer tone color can be obtained. . Therefore, the tone generator 4 of this embodiment uses a plurality of channels to generate one tone. The memory 3 is a storage area for storing and managing various data necessary for channel assignment and the like, and a part table, a note table, a channel table, etc. are stored therein. The part table has the form shown in FIG. 2A, and the number of channels, tone number, reserve channel, number of used channels, note link number of each part is # 1 to # 8. Etc. are memorized. Here, the number of channels in the second row of the part table is the number of channels used for one note (or tone) of the part. The parameters for each part are stored in another memory area (not shown), and are transmitted to the channels required to generate the musical sound of the part when the sound is generated. The third line of the part table stores the tone color number assigned to the part. The tone color number addresses the position where the above parameters are stored. The fourth row of the part table is the number of reserved channels of the channel for the part. The number of reserved channels will be described in detail later.When selecting the channel to be assigned to performance data from the channels currently sounding in the part, select the minimum number of channels that are sounding to guarantee continuous sounding. It is determined. The fifth line of the part table is the number of channels currently in use in the part. The sixth line of the part table is a note link number indicating the relationship (link) with the note table described below. The note table has the form shown in FIG. 2B and the channel table has the form shown in FIG.
Columns are provided. The note table has a free note link register, and the channel table has a free channel link register and a free channel number register. The note link number is stored in the first line of the note table. The note link numbers of the part table and the note table represent the link order of note-on (key depression signal) for the same part, or the link state of free notes that are not used. For example, in the reset state immediately after the power is turned on, the free note link register has the number "1".
Is entered, the note link number field of the note table is "2" in the first column, "3" in the second column, and similarly in the third column.
The value obtained by adding 1 to the column number of that number is entered in each of columns ~ 23, and the symbol "E" meaning "end" is entered in the 24th column.
Is entered. When the note-on of part # 1 occurs, the note is set to the free note link register number "1".
Assigned to the first column of the note table indicated by, and the note link number of part # 1 of the part table is "1",
Rewrite the note link number in the first row of the note table as "E" and the free note link register number as "2". Similarly, when the note-on of part # 1 occurs, the note is assigned to the second column of the note table designated by the number "2" of the free note link register, and the note of part # 1 of the part table is assigned. The link number is "2", the note link number in the second column of the note table is "1", and the free note link register number is "3". That is, the note link number in the part table represents the row of the note table to which the note most recently note-on in the part is assigned. The note link number in the note table is the same part, and represents the column number in which the note-on note that occurred immediately before that note-on is entered. If this column number is "E", it occurred immediately before in the same part. Indicates that there is no note-on. Similarly, among the columns of the note table which are not currently used, the first column is written in the free note link register, and the unused column (empty column) in the note table is replaced by the next empty column. The column number of is written as the note link number. Each column in the note table is merely a space for managing notes, but FIG.
Each column of the channel table shown in (1) corresponds to each channel. That is, the first row is the first channel, the second row is the second channel, and so on. A free channel link register is also provided in the channel table in the same manner, and the leading channel numbers of unused channels are entered. Further, a free channel number register is provided, which represents the current number of empty channels. Therefore, the free channel link number immediately after the power is turned on is "1", and the number of free channels is "24".
Also, the channel link number is entered in the lowest row of the note table. When the note of part # 1 is assigned to the first column of the note table, the note of part # 1 uses three channels as apparent from the part table. Allocate 3 of 3 channels. At this time, the channel link number in the first column of the note table is "1", and the channel link number column of the channel table is "2" for the first channel.
Enter "3" in the second channel and "E" in the third channel. Similarly, when a note that is subsequently note-on in part # 1 is assigned to the second column of the note table, "4" is entered as the channel link number of the note table, and the channel link of the fourth channel of the channel table is entered. The number is "5", the channel link number of the fifth channel is "6", and the channel link number of the sixth channel is "E". With this change, the free channel link number in the free channel link register is updated to "7" and the free channel number in the free channel number register is updated to "18". The second row of the note table stores the number of the note assigned to each column, and the third row stores the note velocity. In the second and subsequent rows of the channel table, the tone color number and status of each channel, such as the state of the envelope, are entered. There are various methods for this status, depending on the sound source method, and will not be described in detail here. Allocation Processing When the channel assigner 2 receives a new note-on (key depression) signal, it performs channel allocation processing according to the procedure shown in the flowchart of FIG. First, when a new note-on signal is received,
From the MIDI channel of the received note-on signal, it is determined which part the note-on signal belongs to, and the part table is referred to check the number of channels required to generate the note of the part (step S).
1). Next, this required channel number is compared with the free channel number indicated by the free channel number register (step S2). At this time, if the number of free channels is larger, the musical tone data is assigned to the row of the note table having the number indicated by the free note link register and the number of the free note link register is updated (step S3). Then, as described above, the note link number of the corresponding part in the part table and the note link number in the note table are updated. Then, the three channels starting with the channel number indicated by the free channel link register are assigned to the musical sound data, and the number of the free channel link register is updated (step S4). Similarly, the free channel number of the free channel number register and the channel link numbers of the note table and the channel table are respectively updated. If there is no empty channel to allocate the required number of channels of the input note, or if there is not enough channels, a truncation process is performed to stop the currently used channel, that is, the currently sounding channel, Assign the stopped channel to a new note. The order of stopping in this case is as follows. A priority is set for each part, and the number of channels in use in each part that exceeds the number of reserved channels is stopped in order from the part with the lowest priority to the part with a high priority. In this embodiment, parts # 1 and #
The order of priority is set low in the order of 2 ... # 8. A reserve channel number (minimum guaranteed channel number) is set for each part. The fourth row of the part table of FIG. 2A shows this reserved channel number. For example, since the reserved channel number of part # 2 is "6", six channels out of the nine channels currently in use are truncated. It will not be done. That is, at least six channels among the channels currently in use are guaranteed to be continuously usable in part # 2. As a result, the minimum number of channels that are considered to be the minimum required for performance expression in each part remain untruncated, so that a musically preferable performance is possible with a limited number of channels. That is, when the number of empty channels is insufficient in step S2 of the flow chart of FIG. 3, first, the number of channels currently used by the lowest priority part # 8 is checked in the part table, and the used channels are searched. The number is compared with the reserved channel number "2" of the part # 8 (step S11). When a number of channels larger than the reserved channel number "2" is used in this part # 8, the number of used channels exceeding the reserved channel number "2" is truncated. On the other hand, if only the number of reserved channels equal to or less than "2" is used in this part # 8, the channel being used in the part # 8 will not be truncated and the part # 8 having the next lowest priority will be used. The usage status of channel 7 is checked (step S10). To select the in-use channel to be truncated when the number of used channels is larger than the number of reserved channels, first, the number of channels corresponding to one note of the part is truncated. If multiple notes are sounded in the part, it is desirable to truncate the earliest released key or the most attenuated note. If the key is not released, a method of giving priority to a note having a high treble or a note having a high level may be considered. Here, the note whose pronunciation has started earliest is truncated. In this case, follow the note table number of the note table in order from the note link number of the corresponding part in the part table, and open the channel table from the note described in the column marked "E" and the channel link number of that column. Follow the steps in sequence to forcibly stop the sound of the corresponding channel. Along with this, the free note link, the free channel link, and the number of free channels are updated (step S1).
1). Then, the process returns to step S2 again to compare the required channel number and the free channel number. Although the number of reserved channels is the minimum guaranteed channel number of the part in the above embodiment, this may be the minimum guaranteed note number. For example, in the part table of FIG. 2, the number of channels of part # 1 is "3" and the number of reserved channels is "6". Therefore, when managing with the minimum guaranteed number of notes, the number of reserved notes is "2". Thus, the reserve number may be defined by the number of channels or the number of notes. As described above, in the present invention, since the number of tone generation channels used by each part is not fixedly allocated to each part, a new input part is required. It is possible to obtain as many musical sound generation channels as possible, so that the performance sound is not limited and the performance expression can be enriched.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an electronic musical instrument provided with an assigner as one embodiment of the present invention. FIG. 2 is a diagram showing various tables stored in a memory in the apparatus of the embodiment. FIG. 3 is a flowchart showing a procedure of channel assignment processing by a channel assigner in the apparatus of the embodiment. [Explanation of symbols] 1 performance data generator 2 channel assigner 3 memory 4 tone generator

Claims (1)

(57) [Claims] (1) Multiple parts using multiple tone generation channels
One of the multiple parts in an electronic musical instrument that performs
When new performance data for playing is input
The tone generation channel to which the new performance data is assigned
An assigner to be selected, which stores the priority of each part for the plurality of parts
The storage means and the musical tone generation channel to which the new performance data is assigned
Allocate the new performance data for selection
If there are not enough music sound generation channels,
The priority order is based on the stored priority order of the part.
Of the tone generation channel to which the lower part is assigned
An electronic musical instrument assigner equipped with a selection means for sequentially selecting from one side . (2) Multiple parts using multiple tone generation channels
One of the multiple parts in an electronic musical instrument that performs
When new performance data for playing is input
The tone generation channel to which the new performance data is assigned
An assigner to be selected, which stores the priority of each part for the plurality of parts
The storage means and the musical tone generation channel to which the new performance data is assigned
Allocate the new performance data for selection
If there are not enough music sound generation channels,
The priority based on the stored priority of the part
Use the parts with the lowest
Of the available tone generation channels
Search whether there is a channel, and if there is, assign it
Equipped with a selection means for selecting various musical tone generation channels
Musical instrument assigner.