JPS5482224A - Forming method of musical tone waveforms - Google Patents

Forming method of musical tone waveforms

Info

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
Application number
JP14920077A
Other languages
Japanese (ja)
Other versions
JPS6116991B2 (en
Inventor
Masatada Wachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP14920077A priority Critical patent/JPS5482224A/en
Publication of JPS5482224A publication Critical patent/JPS5482224A/en
Publication of JPS6116991B2 publication Critical patent/JPS6116991B2/ja
Granted legal-status Critical Current

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
JP14920077A 1977-12-14 1977-12-14 Forming method of musical tone waveforms Granted JPS5482224A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
JPS6116991B2 (en) 1986-05-02

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