JPS54162535A - Octave conversion system - Google Patents

Octave conversion system

Info

Publication number
JPS54162535A
JPS54162535A JP7127078A JP7127078A JPS54162535A JP S54162535 A JPS54162535 A JP S54162535A JP 7127078 A JP7127078 A JP 7127078A JP 7127078 A JP7127078 A JP 7127078A JP S54162535 A JPS54162535 A JP S54162535A
Authority
JP
Japan
Prior art keywords
signal
envelope
musical tone
timbres
sound source
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
JP7127078A
Other languages
Japanese (ja)
Other versions
JPS5931720B2 (en
Inventor
Rokurouta Mandani
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 JP53071270A priority Critical patent/JPS5931720B2/en
Priority to US06/022,104 priority patent/US4233874A/en
Publication of JPS54162535A publication Critical patent/JPS54162535A/en
Publication of JPS5931720B2 publication Critical patent/JPS5931720B2/en
Expired legal-status Critical Current

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  • Electrophonic Musical Instruments (AREA)

Abstract

PURPOSE: To readily obtain the musical tone signal of the timbres close to those of natural tones by applying an envelope signal to a modulating signal and inputting the same to a voltage control amplifier when the sound source signal is on the specified level order.
CONSTITUTION: When the rectified voltage of a sound source signal by a rectifier circuit 6 exceeds threshold voltage, a comparator 7 products its output which in turn operates an envelope generating circuit 8 to generate the envelope signal which has been so set that its rise is fast and attenuates exponential-functionally and the attenuation time thereof becomes shorter than the envelope of the musical tone signals. This signal is combined with the modulating signal in a mixing circuit 4 and the composite signal inputs a voltage control amplifier 2. Since the constant C of the amplifier 2 changes with time according to this signal, the second order harmonic overtone signal is envelop-formed and if the even number order harmonic overtones other than this are contained, these are similarly envelope-formed. Thereby the musical tone signals of the timbres close to those of natural tones may be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP53071270A 1978-03-25 1978-06-13 Octave conversion method Expired JPS5931720B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP53071270A JPS5931720B2 (en) 1978-06-13 1978-06-13 Octave conversion method
US06/022,104 US4233874A (en) 1978-03-25 1979-03-20 Frequency conversion system of tone signal produced by electrically picking up mechanical vibration of musical instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53071270A JPS5931720B2 (en) 1978-06-13 1978-06-13 Octave conversion method

Publications (2)

Publication Number Publication Date
JPS54162535A true JPS54162535A (en) 1979-12-24
JPS5931720B2 JPS5931720B2 (en) 1984-08-03

Family

ID=13455851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53071270A Expired JPS5931720B2 (en) 1978-03-25 1978-06-13 Octave conversion method

Country Status (1)

Country Link
JP (1) JPS5931720B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122096A (en) * 1980-03-03 1981-09-25 Kawai Musical Instr Mfg Co Electric piano

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122096A (en) * 1980-03-03 1981-09-25 Kawai Musical Instr Mfg Co Electric piano

Also Published As

Publication number Publication date
JPS5931720B2 (en) 1984-08-03

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