JP3745063B2 - Music generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a musical sound generating apparatus that generates a single musical sound signal by combining a plurality of waveform signals.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a musical tone generator as described above, a musical tone generator that generates a single musical tone signal by sequentially synthesizing a plurality of waveform data (waveform signals) and a plurality of waveform data that are synthesized simultaneously 1 2. Description of the Related Art Musical tone generators that generate two musical tone signals are known.
[0003]
FIG. 6 is a diagram showing a plurality of waveform data constituting one musical tone, and FIG. 7 is a diagram illustrating the principle of a conventional musical tone generating apparatus that synthesizes a plurality of waveform data sequentially to generate one musical tone signal. FIG.
Here, it is assumed that when a striking pad simulating a percussion instrument is hit, a musical sound signal representing a percussion instrument sound is generated.
[0004]
FIG. 6 shows six types of waveform data 1, 2,..., 6 as shown in FIGS. 6 (a) to 6 (f). The waveform data 2, 4 and 6 are obtained when the pad is tapped weakly.
In order to generate one musical tone signal from six types of waveform data 1, 2,..., 6 as shown in FIGS. 6 (a) to 6 (f), first, a musical tone signal is generated at time t0 shown in FIG. A trigger signal representing an instruction is input. Then, in response to the input of the trigger signal, the start address and end address of the waveform data 1 are written in a waveform reading unit (not shown) in step S71. In step S72, a sound generation start command is written in the waveform reading unit. Then, waveform data 1 constituting one musical tone signal A is generated at time t1. Similarly, in steps S73, S74, steps S75, S76, steps S77, S78, steps S79, S80, and steps S81, S82, waveform data 2, 3, 4, at times t2, t3, t4, t5, and t6. 5, 6 are generated sequentially. In this way, one musical sound signal A is generated from the six types of waveform data 1, 2,... In this musical tone generator, the time from the time t0 when the trigger signal is input to the sound generation start time t1 can be short.
[0005]
FIG. 8 is a diagram illustrating the principle of a conventional musical tone generating apparatus that generates a single musical tone signal by simultaneously synthesizing a plurality of waveform data.
In order to generate one musical tone signal from six types of waveform data 1, 2,..., 6 as shown in FIG. 6 (a) to FIG. A trigger signal is input at time t0. Then, in response to the input of this trigger signal, in step S91, all start addresses and end addresses from waveform data 1 to waveform data 6 are written into the waveform reading unit.
[0006]
In step S92, a sound generation start command is written in the waveform reading unit. Then, at the time tp, all six types of waveform data 1, 2,..., 6 are synthesized at the same time, thereby generating one musical sound signal B. In this musical tone generating apparatus, since six types of waveform data are synthesized simultaneously to generate one musical tone signal B, the start of sound generation of the six types of waveform data is started simultaneously at time tp. Synchronizing the sound generation start times of a plurality of waveform data in this way is called phase lock, and sounding by performing phase lock processing is called “sounding with phase lock”. In this musical sound generating device, since the sound generation start times of the six types of waveform data are the same time, the sense of attack is not impaired in terms of hearing.
[0007]
[Problems to be solved by the invention]
However, in the technique of the musical tone generation apparatus that generates a single musical tone signal by sequentially synthesizing a plurality of waveform data shown in FIG. 7, a start address and an end address are written to the waveform reading unit for each waveform data. Therefore, a processing time is generated each time, and each of the six types of waveform data constituting one musical tone signal is pronounced as indicated by times t1, t2, t3, t4, t5, and t6 shown in FIG. A start time shift occurs. For this reason, the time from the time t0 when the trigger signal is input to the sounding start time t1 can be short, but there is a problem that the sense of attack is impaired in terms of hearing.
[0008]
On the other hand, in the technique of the musical tone generating apparatus that simultaneously synthesizes a plurality of waveform data and generates one musical tone signal as shown in FIG. 8, the start address and the end address of all the plurality of waveform data are simultaneously written in the waveform reading unit. Therefore, a long processing time occurs, and it takes a long time from the time t0 when the trigger signal is input to the sound generation start time tp. In general, in an electronic musical instrument, if the time from the input of a trigger signal to the start of sound generation is long, particularly when the pad is struck, a delay in sound generation may stand out and hinder the performance. Moreover, recent electronic musical instruments have different waveform data groups for hard hits and weak hits, and the composition ratio of multiple waveform data according to the amplitude of the input trigger signal (strength of hitting the pad). There are many things that change In such a case, a large amount of waveform data is reproduced with a phase lock at the same time, and although there is no sense of attack for hearing, there is a case where delay in pronunciation is regarded as a problem.
[0009]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a musical sound generation device whose sound generation start time is advanced without impairing the sense of attack on hearing.
[0010]
[Means for Solving the Problems]
A musical sound generation device of the present invention that achieves the above object is a musical sound generation device that generates a single musical sound signal by combining a plurality of waveform signals,
Storage means for storing the plurality of waveform signals;
Receiving a tone signal generation instruction, receiving a waveform read parameter setting for reading the waveform signal from the storage means, and further receiving a generation start instruction to read out and generate a waveform signal corresponding to the waveform read parameter from the storage means; Waveform signal generating means for generating a plurality of waveform signals;
In order to divide a plurality of waveform signals constituting one musical sound into a first group and a second group, a phase lock group for setting the sounding start times of a plurality of waveform data for one musical sound waveform is set. Grouping information storage means for storing grouping information;
In response to a music signal generation instruction, in accordance with the grouping information stored in the grouping information storage means, waveform read parameters for generating a waveform signal for the first phase-lock group are set in the waveform signal generation means. , Instructing to start reading and generating the sound generation start time for all the waveform signals constituting the group for which the setting of the waveform reading parameter has been completed,
Next, a waveform readout parameter for generating a waveform signal is set for the second phase lock group, and a sounding start time is set for all waveform signals constituting the group for which the setting of the waveform readout parameter has been completed. In addition, a musical tone signal generation control means for instructing the start of read generation is provided.
[0011]
In general, percussion instruments have different timbres depending on their tapping strength. When tapping hard, a waveform signal containing many high frequency components is generated, and when tapping weakly, a waveform signal containing little high frequency components is generated. If you hit it hard, it will begin to sound quickly. Therefore, the grouping information storage means that a plurality of waveform signals that generate a waveform signal that contains a lot of high frequency components that are generated when hitting strongly do not have much high frequency components that are generated when they are hit weakly. A plurality of waveform signals that generate waveform signals not included are grouped together, and a plurality of waveform signals are generated by firstly striking strongly with a tone signal control means, and then a plurality of waveforms when tapping weakly Generate a signal. Then, by mixing the generated waveform signals at a ratio corresponding to the hit strength, a tone color waveform signal corresponding to the hit strength is generated. In this way, it is possible to obtain a timbre waveform signal that corresponds to the strength of the strike, and to strike strongly without impairing the sense of attack in both the case of hitting strongly and the case of hitting weakly. This reduces the delay in pronunciation. Further, a phase shift between a plurality of waveforms when a strong strike is made, and a phase shift between a plurality of waveform signals when a weak strike is made are reduced. Therefore, the phases of the waveform signals are shifted from each other, and depending on the phase relationship, the waveform signals of a certain frequency component are weakened or disappeared, or the waveform signals of a certain frequency component are emphasized. Is prevented from changing.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a block diagram of an electronic musical instrument including an embodiment of a musical sound generating apparatus according to the present invention.
In the present embodiment, description will be made with reference to the six types of waveform data shown in FIG. 6 in addition to FIG.
[0013]
The CPU 11 shown in FIG. 1 reads out the program stored in the ROM 12 via the data bus 17 and executes various processes using the RAM 13 as a work area. In the ROM 12, a program for controlling the entire electronic musical instrument 10 shown in FIG. 1, and six types of waveform data (see FIG. 6) constituting one musical tone, which will be described in detail later, are divided into two groups. Stored is grouping information formed by (phase lock grouping) and musical tone control information composed of start addresses and end addresses of six types of waveform data.
[0014]
The RAM 13 is provided with a work area for the CPU 11 to execute various processes when performing musical tone control.
The trigger input unit 14 has a plurality of pad inputs for inputting a trigger signal from the plurality of pads 1, pads 2,... The terminal is equipped. The trigger input unit 14 sends the trigger signal to the CPU 11 via the data bus 17.
[0015]
The waveform memory 15 stores six types of waveform data 1, 2,..., 6 shown in FIG.
In the waveform reading unit 16, the start address, end address, and sound generation start command, which are parameters for generating the waveform data stored in the waveform memory 15, are written from the CPU 11 and stored in the waveform memory 15. Read waveform data.
[0016]
In the electronic musical instrument 10 configured as described above, each of the six types of waveform data stored in the waveform memory 15 is received according to the musical tone control information stored in the ROM 12 in response to the trigger signal input to the trigger input unit 14. By writing a start address, an end address, and a sound generation start command to the waveform reading unit 16, the six types of waveform data are phase-locked to generate a musical sound. This will be described in detail below.
[0017]
FIG. 2 is a schematic diagram showing an area where the musical tone control information is stored in the ROM 12 shown in FIG.
In the ROM 12, in the areas 21, 22,..., 2n corresponding to the pads 1, 2,..., N shown in FIG. ing. When the trigger signal is detected from any one of the pads 1, 2,..., N, the tone control information of the tone number corresponding to the number of the pad is stored in the tone control information 1, 2,. The data is read by the CPU 11 and sent to the waveform reading unit 16 as a command for instructing sound generation. The musical tone control information 1, 2,..., N are phase lock group 1, phase lock group 2, start address 1, end address 1, start address 2 and end as shown on the right side of FIG. Address 2, Start address 3, End address 3, Start address 4, End address 4, Start address 5, End address 5, Start address 6, End address 6
[0018]
As will be described in detail later, the phase lock group stores the number of the waveform data to which the first phase lock is applied, and the phase lock group 2 stores the number of the waveform data to which the second phase lock is applied. ing. The start address 1 and the end address 1 store the start address and the end address of the waveform data 1 stored in the waveform memory 5. Similarly, after the start address 2 and after the end address 2, the start address and the end address of the waveform data corresponding to them are stored.
[0019]
FIG. 3 is a schematic diagram showing a state in which the phase lock is applied to the waveform data of the phase lock group 1 and the phase lock group 2 shown in FIG.
FIG. 3A shows the correspondence between each bit and the number of waveform data to be phase-locked. If bit is 1, phase lock is applied between those waveform data. In the present embodiment, since six types of waveform data are described, a 6-bit configuration is used. However, if the number of waveform data that can be reproduced simultaneously increases, the number of bits increases accordingly.
[0020]
FIG. 3B shows bit data stored in the phase lock group 1. Here, bits 0, 2, and 4 are 1 (the value of phase lock group 1 is 15H). For this reason, the phase lock is applied to the waveform data 1, 3 and 5 when the pad is strongly hit, and the sound is simultaneously generated. FIG. 3C shows bit data stored in the phase lock group 2. Here, bits 1, 3, and 5 are 1 (the value of phase lock group 2 is 2AH). For this reason, the phase lock is applied to the waveform data 2, 4, 6 when the pad is struck weakly, and the sound is simultaneously generated.
[0021]
FIG. 4 is a flowchart of the main routine of the electronic musical instrument shown in FIG.
When the electronic musical instrument 10 shown in FIG. 1 is turned on, this routine is started. First, initial setting is performed in step S401. Next, the process proceeds to step S402. In step S402, it is determined whether or not a trigger signal is input from the pad n (n represents the number of the hit pad). If it is determined that the trigger signal is input, the process proceeds to step S403. On the other hand, if it is determined that no trigger signal is input, the process returns to step S402 to wait for the trigger signal. In step S403, the value of phase lock group 1 of the musical tone control information n is substituted for the variable i, and the process proceeds to step S404. Step S404 is a phase-lock sound generation routine shown in FIG. 5, which will be described later. By this routine, the waveform data 1, 3, and 5 of the phase-lock group 1 are phase-locked to perform sound generation processing. Next, the process proceeds to step S405. In step S405, the value of phase lock group 2 of the musical tone control information n is substituted for variable i, and the flow proceeds to step S406. Step S406 is a phase-lock sound generation routine, which will be described later. With this routine, the phase lock is applied to the waveform data 2, 4, and 6 of the phase-lock group 2 to perform sound generation, and the process returns to step S402.
[0022]
FIG. 5 is a flowchart of the phase lock sound generation processing routine shown in FIG.
First, in step S501, 1 is substituted into a variable j (counter), and the process proceeds to step S502. In step S502, it is determined whether or not the value of the 0th bit of the variable i is 1. The variable i is the value of the phase lock group 1 substituted in step S403 shown in FIG. If it is determined that the 0th bit of the variable i is 1, the process proceeds to step S503. On the other hand, if it is determined that the 0th bit of the variable i is not 1, the process proceeds to step S505. In step S503, the start address j (start address of the jth waveform data) is written in the waveform reading unit, and the process proceeds to step S504. In step S504, the end address j (end address of the j-th waveform data) is written in the waveform reading unit, and the process proceeds to step S505. In step S505, the variable i is bit-shifted right by 1 bit, and the process proceeds to step S506. In step S506, the variable j is incremented, and the process proceeds to step S507. In step S507, it is determined whether the variable j is larger than the value of MAXWAVE. MAXWAVE is a constant and is set to the maximum number of waveform data that can be reproduced simultaneously. In the present embodiment, since the maximum number of waveform data is 6, it is set to 6. If it is determined that the variable j is larger than MAXWAVE, the process proceeds to step S508. In step S508, the waveform data generation start command for which the start address and end address have been set in the previous steps S503 and S504 is written to the waveform reading unit, and the process returns. On the other hand, if it is determined in step S507 that the variable j is less than MAXWAVE, the process returns to step S502.
[0023]
As described above, in the present embodiment, two phase lock groups 1 and 2 are set, a waveform data group for reproducing a musical sound when banging on phase lock group 1 is set, and phase lock group 2 is set. The waveform data group for reproducing the musical sound when hit softly is set, the waveform data group of the phase lock group 1 is reproduced first, and then the waveform data group of the phase lock group 2 is reproduced. Therefore, without damaging the sense of attack in each case of strong hit and weak hit, and the delay of pronunciation when hit hard, the case of applying phase lock to all waveform data of conventional musical sound generator Compared and reduced.
[0024]
In this embodiment, two phase lock groups 1 and 2 are set to generate one musical sound signal. However, the present invention is not limited to this, and three or more phase lock groups are set to 1 Two musical sound signals may be generated.
[0025]
【The invention's effect】
As described above, according to the present invention, when a single musical tone signal is generated by synthesizing a plurality of waveform signals, the sound generation start time can be advanced without impairing the sense of attack.
[Brief description of the drawings]
FIG. 1 is a block diagram of an electronic musical instrument including an embodiment of a musical sound generating apparatus according to the present invention.
FIG. 2 is a schematic diagram showing an area of the ROM 12 shown in FIG. 1 in which musical tone control information is stored.
FIG. 3 is a schematic diagram showing a state in which phase lock is applied to waveform data of phase lock group 1 and phase lock group 2 shown in FIG. 2;
4 is a flowchart of a main routine of the electronic musical instrument shown in FIG.
5 is a flowchart of a phase-lock sound generation processing routine shown in FIG.
FIG. 6 is a diagram showing a plurality of waveform data constituting one musical sound.
FIG. 7 is a principle explanatory diagram of a conventional musical tone generation apparatus that generates a single musical tone signal by sequentially synthesizing a plurality of waveform data.
FIG. 8 is a diagram illustrating the principle of a conventional musical tone generating apparatus that generates a single musical tone signal by simultaneously synthesizing a plurality of waveform data.
[Explanation of symbols]
10 Musical sound generator 11 CPU
12 ROM
13 RAM
14 Trigger input section 15 Waveform memory 16 Waveform readout section 17 Data buses 21, 22,..., 2n ROM area

Claims (1)

A musical sound generation device that generates a single musical sound signal by combining a plurality of waveform signals,
Storage means for storing the plurality of waveform signals;
Receiving a tone signal generation instruction, receiving a waveform readout parameter setting for reading out a waveform signal from the storage means, and further receiving a generation start instruction to read out and generate a waveform signal corresponding to the waveform readout parameter from the storage means; Waveform signal generating means for generating a plurality of waveform signals;
In order to divide a plurality of waveform signals constituting one musical sound into a first group and a second group, a phase lock group is set to match the sound generation start times of a plurality of waveform data for one musical sound waveform. Grouping information storage means for storing grouping information;
In response to a music signal generation instruction, in accordance with the grouping information stored in the grouping information storage means, waveform read parameters for generating a waveform signal for the first phase lock group are set in the waveform signal generation means. , Instructing to start reading and generating the sound generation start time for all the waveform signals constituting the group for which the setting of the waveform reading parameter has been completed,
Next, a waveform readout parameter for generating a waveform signal is set for the second phase lock group, and a sounding start time is set for all waveform signals constituting the group for which the setting of the waveform readout parameter has been completed. A musical tone generation apparatus comprising musical tone signal generation control means for instructing the start of readout generation.

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