Claims
- 1. A tone generating apparatus, comprising:
- a wave memory within which is stored a plurality of first tone waveform data each of which has a preselected length extracted from an attack portion of a corresponding plurality of musical tones and a plurality of second tone waveform data each of which has a preselected length following associated first tone waveform data;
- read means for reading a selected first tone waveform data of said plurality of first waveform data only once from said wave memory and subsequently reading associated second tone waveform data of said plurality of second waveform data repeatedly;
- a first predetermined plurality of said plurality of second waveform data having a value of zero so that no musical tone is produced when said first predetermined plurality of second waveform data is read repeatedly and a second predetermined plurality of second waveform data having a value that non-zero so that sustaining musical tones are produced when said second predetermined plurality of second waveform data is read repeatedly;
- tone generating means for generating a musical tone based on said tone waveform data read out by said read means;
- whereby said read means is the only read means required to read musical tones having sustaining portions and musical tones not having sustaining portions.
- 2. A tone generating apparatus according to claim 1, wherein each first tone waveform data of said plurality of first tone waveform data stored in said wave memory is prepared by pulse code modulation of an original tone.
- 3. A tone generating apparatus according to claim 1, wherein each first tone waveform data of said plurality of first waveform data stored in said wave memory is prepared by normalizing an envelope when an original tone has attenuating property.
- 4. A tone generating apparatus according to claim 1, wherein with reference to each first tone waveform data of said first plurality of waveform data stored in said wave memory, an arbitrary interval adjacent each second tone waveform data of said plurality of second waveform data is prepared to attenuate tone waveform data.
- 5. A tone generating apparatus according to claim 1, wherein said read means repeatedly reads each second tone waveform data of said plurality of second waveform data in one direction, following reading of associated first tone waveform data of said plurality of first waveform data.
- 6. A tone generating apparatus according to claim 11, wherein said read means repeatedly reads each second tone waveform data of said plurality of second waveform data in first and second directions, following reading of associated first tone waveform data of said plurality of first waveform data.
Priority Claims (1)
Number |
Date |
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3-042423 |
Feb 1991 |
JPX |
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Parent Case Info
This is a continuation of copending U.S. patent application(s) Ser. No. 07/835,171 filed on Feb. 13, 1992 and now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4263828 |
Aoki et al. |
Apr 1981 |
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4573389 |
Suzuki |
Mar 1986 |
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4947723 |
Kawashima et al. |
Aug 1990 |
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Continuations (1)
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Number |
Date |
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Parent |
835171 |
Feb 1992 |
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