JPH0285498U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is an overall circuit diagram of an electronic keyboard instrument to which this invention is applied, and Fig. 2 is the time between the peak value y of the waveform data stored in the waveform memory 6 in Fig. 1 and the inflection point of the peak value y. A graph diagram showing the relationship between the values x,
FIG. 3 is a circuit configuration diagram of a waveform generation section showing an example of a specific circuit configuration of the waveform generation section 7 in FIG.
This figure is a circuit configuration diagram of a waveform generation section showing another example of the specific circuit configuration of the waveform generation section 7 in FIG. 1. 1...CPU, 5...Waveform address generator, 6...Waveform memory, 7...Waveform generation unit, 3-
1, 3-3, 3-5, 4-1, 4-3, 4-5...
...Latch circuit, 3-2, 4-2...Subtractor, 3-
4...Divider, 3-6, 3-7, 4-6...Adder, 3-8, 4-9...Comparator, 4-4...Reciprocal converter, 4-7...Sine wave ROM, 4-8...
Multiplier.

Claims (1)

[Scope of claim for utility model registration] The peak value at the inflection point of the waveform data of a musical tone,
storage means for storing time values indicating time intervals between adjacent inflection points; and waveform data between the adjacent inflection points based on the wave height value and the time value read from the storage means. A waveform generation device comprising: a waveform generation means for generating a waveform;