JPS5482224A - Forming method of musical tone waveforms - Google Patents
Forming method of musical tone waveformsInfo
- Publication number
- JPS5482224A JPS5482224A JP14920077A JP14920077A JPS5482224A JP S5482224 A JPS5482224 A JP S5482224A JP 14920077 A JP14920077 A JP 14920077A JP 14920077 A JP14920077 A JP 14920077A JP S5482224 A JPS5482224 A JP S5482224A
- Authority
- JP
- Japan
- Prior art keywords
- waveform
- musical tone
- fifo
- key
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electrophonic Musical Instruments (AREA)
Abstract
PURPOSE: To simplify the circuits of applying desired filter characteristics by conberting the functions of time regions to the functions of frequency regions and processing data in the frequency regions.
CONSTITUTION: When key-ON signals are detected, RAMs 6, 7 are cleared and (m), (n) indicating the order of the periods of performing Fourier transformation and the order of sampling points of waveforms are set at numerical value zero ϕ. When xm(n) is read out from a waveform memory 1, this and impulse response g(n) are convolution-operated and the third waveform Vm(n) is generated as Vm(n)×g(n). Until the key-OFF state is detected, an adder 8 operates the synthesized waveform ym(n)=Vm(n)+Um(n)+Um-1(N+n) and inputs the same to FIFO 10. The frequencies of sampling clocks from terminal 14 are determined by desired musical tone frequencies, whereby reading and writing of the FIFO 10 are performed. Thereby, desired filter characteristics may be obtained with the simple circuits.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14920077A JPS5482224A (en) | 1977-12-14 | 1977-12-14 | Forming method of musical tone waveforms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14920077A JPS5482224A (en) | 1977-12-14 | 1977-12-14 | Forming method of musical tone waveforms |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5482224A true JPS5482224A (en) | 1979-06-30 |
JPS6116991B2 JPS6116991B2 (en) | 1986-05-02 |
Family
ID=15470002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14920077A Granted JPS5482224A (en) | 1977-12-14 | 1977-12-14 | Forming method of musical tone waveforms |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5482224A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0338481A (en) * | 1989-07-06 | 1991-02-19 | Honda Motor Co Ltd | Centrifugal belt transmission for vehicle |
-
1977
- 1977-12-14 JP JP14920077A patent/JPS5482224A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6116991B2 (en) | 1986-05-02 |
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