JPS6022190A - Musical tone 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 Field of the Invention The present invention relates to a musical tone synthesis device using time axis data related to synthesis.

Conventional configurations and their problems In recent years, digital sound sources for musical tone synthesizers have come into widespread use, and the PGM method is one of the methods used.

Phoneme segment synthesis methods have come into widespread use.

Two types of conventional musical tone synthesis devices will be described below.

FIG. 1 is a block diagram of a conventional musical tone synthesis device, in which 1 is a waveform memory section that stores a group of time-axis data related to synthesis;
2 is a control unit that reads time axis data related to synthesis from the waveform memory unit; 3 is a D/A converter that converts the time axis data read from the control unit; and 4 is a D/A converter 3 that converts the time axis data read from the control unit. An amplification section 6 amplifies the converted analog signal, and an amplification section 6 records information regarding reading out time-axis data related to synthesis.
I', f3 is the table memory section.

Furthermore, when the conventional configuration is denoted as A, there is also one that does not have a table memory section but has an amplitude control section 5 that controls the amplification factor of the amplification section, as shown in B in FIG.

The operation of the musical tone synthesis apparatus configured as described above will be explained below.

First, the control section 2 to which the musical tone output instruction signal is input reads out time-axis data related to synthesis corresponding to the musical tone to be output from the waveform memory section 1 in accordance with information regarding reading from the table memory section 6.

Next, the read time axis data is converted into an analog signal by the D/A converter 3, and this analog signal is amplified by the amplifier 4.

On the other hand, in the tone synthesis apparatus having the configuration shown in B in FIG. 1, the control section 2 to which the musical tone output instruction signal is inputted sequentially reads out time axis data regarding synthesis corresponding to the musical tone to be output.

Next, the read time axis data is converted into an analog signal by the D/A converter 3, and this analog signal is amplified by the amplifier 4. At this time, the amplitude controller 5
A signal is output to control the amplification factor of the time axis envelope.

Regarding the two types of configurations shown in the conventional example, in FIG. 1, the middle person in FIG.
A group of phoneme segments in which time axis envelope information is included in the time axis data 7FY (hereinafter referred to as phoneme pieces) consisting of 7FY is recorded in advance, and B in Figure 1 is the waveform shown in b in Figure 2. One phoneme piece such as tQ is held in the waveform memory section 1 in advance as shown in C in FIG.
The time axis envelope is controlled by the amplitude control unit 6. However, in the above configuration, first, for the middle person in Figure 1, since the phoneme piece itself contains time axis envelope information, an arbitrary time Adding an axis envelope is difficult.

Regarding B, since only one representative phoneme is used, the sound quality is inferior. There were drawbacks such as.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a musical tone synthesis device that can add an arbitrary time axis envelope to time axis data related to synthesis without deteriorating the sound quality. do.

Structure of the Invention The present invention comprises a waveform memory unit that stores a group of time axis data related to synthesis that has been normalized by energy on the time axis in advance, a control unit that reads time axis data related to synthesis from the waveform memory unit, and a control unit that reads out time axis data related to synthesis from the waveform memory unit. a table memory section that stores information related to reading time-axis data;
This musical tone synthesis device includes a D/A conversion section, an amplification section, and an amplitude control section, and the amplification factor of the amplification section can be controlled by the amplitude control section.

DESCRIPTION OF THE EMBODIMENTS FIG. 3 shows a block diagram of a musical tone synthesis apparatus according to an embodiment of the present invention.

In Fig. 3, γ is, for example, when the time axis data related to synthesis is phoneme piece data, the energy is made uniform on the time axis for each phoneme piece, or when the time axis data related to synthesis is PCM data. , a waveform memory unit that stores the energy on the time axis divided into several points, that is, the energy on the time axis for each frame is made uniform; 8 is a control unit; 9 is a D/A converter unit , 10 is an amplification section, 11 is an amplitude control section, and 12 is a table memory section.

The operation of the musical tone synthesis apparatus of this embodiment configured as described above will be explained below.

First, the control unit 8 to which the musical tone output instruction signal is input is opened, and time axis data regarding the normalization and synthesis of energy on the swaying time axis corresponding to the musical tone to be output is read out from the waveform memory unit 7. .

Next, the read time axis data is converted into an analog signal by the D/A converter 9, and this analog signal is amplified by the amplifier 10, but at this time, the amplitude controller 11 amplifies the signal for controlling the amplification factor. 10 to control the time axis envelope.

As described above, according to this embodiment, data that has been normalized by energy on the time axis is stored in the waveform memory 7 as a time axis data group related to synthesis,
By controlling the amplification factor of the amplification section 10 by the amplitude control section 11, an arbitrary time axis envelope can be added to the musical tone signal output from the amplification section 10 without deteriorating the sound quality.

In the present embodiment, the control signal of the amplitude control section 11 is output to the amplifier section 1o, but if a multiplication type D/A converter is used as the D/A conversion section, this control signal becomes "D/AD/ An A converter may be used, or even if a multiplier is provided between the control section and the D/A conversion section, the same musical tone signal output from the amplification section can be obtained.

Effects of the Invention As described above, the present invention prevents deterioration of sound quality by storing data that has been normalized by energy on the time axis in the waveform memory section as a group of time axis data related to synthesis. Furthermore, by controlling the amplification factor of the amplification section by the amplitude control section, it is possible to add an arbitrary time axis envelope to the musical tone signal output from the amplification section.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional musical tone synthesizer, FIG. 2 is a waveform diagram of the main parts thereof, and FIG. 3 is a block diagram of a musical tone synthesizer according to an embodiment of the present invention. 7... Waveform memory section, 8... Control section,
9...D/A conversion unit, 10...Amplification unit, 11...Amplitude control. Section, 12...Table memory section. ? Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 1! 8th lock

Claims (2)

[Claims] (1) a waveform memory section that stores time-axis data related to synthesis; a control section that reads out time-axis data related to synthesis from the waveform memory section; and a table memory section that stores information related to reading out time-axis data related to synthesis. , D/A the time axis data read out from the control section.
A musical tone synthesis device comprising: a D/A converter for converting, an amplifying section for amplifying the analog signal converted by the D/A converter, and an amplitude control section for controlling the amplification factor. (2) Claim 1, characterized in that the waveform memory section has data that has been normalized by energy on the time axis as time axis data related to synthesis.
The musical tone synthesis device described in Section 1.