JPS59176784A - Musical note synthesizer - 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] (Industrial Application Field) The present invention utilizes a phoneme piece editing method or a PCM method, etc.
In particular, the present invention relates to a musical tone synthesis device that can obtain high-quality musical tones for legato playing style.

(Structures of conventional examples and their problems) Generally, various synthesis methods have been tried as digital musical tone synthesis methods. The following methods have been implemented as a solution to the occurrence of click noise.

■ Between two consecutive tones, the output period of the two tones is changed stepwise by linear interpolation or the like.

■ Temporarily attenuate the output between two consecutive notes.

In this case, in ■, when the output period ratio for legato processing is large, Schifflik noise occurs, and in ■, it is possible to reduce the crease noise, but for all musical intervals, the subsequent tones during legato are It had the disadvantage that the stand-up lever was fixed, and a key control section had to be added.

(Object of the Invention) An object of the present invention is to provide a musical tone synthesis device that can eliminate such conventional drawbacks in the time axis encoding synthesis method and obtain high quality musical tones for legato playing style. It is.

(Structure of the Invention) The present invention suppresses click noise during legato performance by obtaining a synthesized waveform similar to that obtained when performing gain control without adding a gain control section, and by generating a different rise for each pitch. This will be explained in detail below with reference to the drawings.

(Description of Embodiment) FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
1 is an input section, 2 is a control section, 3 is a table memory section, 4 is a phoneme memory section, 5 is an output buffer section, and 6 is a DA conversion section.

In this device, after information regarding the designation of the type of musical instrument and pitch is input to the human power section 1, this information is output to the control section 2. Based on the above information, the control unit 2 receives information from the table memory unit 3 regarding the address, data length, repetition, DA sampling period, and whether or not calculation is required regarding the phoneme piece or phoneme group data to be output. After reading the phoneme piece data or phoneme group data from the phoneme memory section 4 according to this information, if the phoneme piece data or phoneme group data does not require calculation, the calculation is performed to output it to the output buffer section 5. If the phoneme piece data or phoneme group data requires An instruction signal indicating the output time period of the digital musical tone signal from the cover amplifier section 5 to the DA converter section 6 is outputted to the output buffer section 5. Output buffer 1
The section 5 outputs the digital musical tone signal to the DA converter 6 in synchronization with the output time period instruction signal from the control section 2, and the DA converter 6 converts the digital musical tone signal into an analog musical tone signal. The above operation continues until the output instruction signal from the input section 1 stops.

Next, the characteristic contents of the present invention in this embodiment will be explained.

FIG. 2 shows that when the human power section 1 is intermittently executed twice to generate musical tones, the control section 2 reads table memos IJM, . Phoneme group Ply. This shows a waveform obtained by reading and outputting P2. Note that in the figure, a indicates the rising portion, and b indicates the portion after the rising portion.

FIG. 3 shows the result when the musical tone generation instruction to the input section 1 is executed twice in succession, and when playing the tsuma silegato.

The control section 2 uses a table memory M1. which is different from that shown in FIG. 2 regarding musical tones subsequently output from the table memory section 3.
This shows the waveform obtained by reading out M2 and reading and outputting each designated phoneme piece or phoneme group P1rP'2.

The characteristic difference between FIG. 2 and FIG. 3 is the difference in the rise time of the second note when playing legato, and that the rise time when playing legato is much shorter.

FIG. 4 is an explanatory diagram of another preferred embodiment, in which M'2 is defined from the middle of the table memory M2 during legato performance, and a phoneme piece or a phoneme group P"2 (P2>P'
2) can also be compressed.

FIG. 5 is an explanatory diagram of a more preferred embodiment, in which the table memory M2 of the second tone is further set up in the table memo I.
J It is divided into MT2 and the table memory MS2 for the starting point and after, and when the second note is legato, the table memory M≦ is shared with the starting point table memory MT2 and the table memory MS2 for the starting point and after. In this case, the phoneme data specified by legato table memo IJ MT' is phoneme data for completely clearing the output buffer section 5, and phoneme data having the properties described below. This figure shows an example consisting of data ΔP(i). Note that C in the figure indicates the buffer clear range.

Here, when the first phoneme piece data instructed by the table memory MS2 after the rising edge is P(i), ΔP
(1) is defined as a phoneme segment requiring an addition operation with R repetitions as follows.

However, L is the phoneme piece data length of P(i).

In addition, in this embodiment, it is possible to reduce the amount of memory by compressing the phoneme piece data in the recorder 1 start-up section to 1/R times.

(Effects of the Invention) As explained above, according to the present invention, it is possible to eliminate click noise during legato playing without adding a gain control section, and to adjust the start-up noise during legato playing for each pitch. It is possible to vary the values appropriately, and there is an advantage in that it is possible to provide a musical tone synthesizer that requires only a slight increase in the memory required for implementation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. 2 to 5 are output waveform diagrams for explaining the present invention in detail. DESCRIPTION OF SYMBOLS 1... Input section, 2... Control section, 3... Table memory section, 4... Phoneme memory section, 5... Output buffer section, 6... DA conversion section. Figure 1

Claims (2)

[Claims] (1) A phoneme memory section that stores phoneme pieces or phoneme groups necessary to synthesize musical tones with pitches corresponding to the type of musical instrument, and reads out the phoneme pieces or phoneme groups from the phoneme memory section and generates a certain digital sound signal. or after reading the phoneme piece or phoneme group from the phoneme memory unit and performing an addition operation on the corresponding data of the phoneme piece or phoneme group output to the output cover or the output unit immediately before a control unit that outputs a digital musical tone signal to an output buffer unit; an input unit that instructs the control unit the type and pitch of the musical tone to be output; and the start and end of output of the musical tone to be output; and output to the output buffer section. a table memory section that stores information regarding the address, repetition number, and output cycle of the phoneme piece or phoneme group to be input in the memory section, and information regarding implementation/non-execution of the addition operation; an output buffer unit that temporarily stores a digital musical tone signal and outputs the digital musical tone signal to a downstream DA converter in accordance with information regarding the output cycle; It includes a DA conversion section that converts the signal into an analog musical tone signal, and when the instruction signal regarding the output musical tone from the input section is generated in time series, the instruction signal can be continuous in time or intermittently. 1. A musical tone synthesizing device, wherein different table memories are read from said table memory section into said control section for musical tones to be output temporally succeedingly at different times. (2) When instruction signals regarding output musical tones from the input section are generated in a time-series manner, the table memory section stores information regarding temporally subsequent musical tones when the instruction signals are continuous in time or intermittently. The table memory read from is slightly different! Claim No. 1 (1)
) The musical tone synthesis device described in section 2.