JPS54127313A - Electric musical instrument having octave changeover function - Google Patents

Electric musical instrument having octave changeover function

Info

Publication number
JPS54127313A
JPS54127313A JP3454278A JP3454278A JPS54127313A JP S54127313 A JPS54127313 A JP S54127313A JP 3454278 A JP3454278 A JP 3454278A JP 3454278 A JP3454278 A JP 3454278A JP S54127313 A JPS54127313 A JP S54127313A
Authority
JP
Japan
Prior art keywords
signals
sound source
octave
frequencies
source signals
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.)
Pending
Application number
JP3454278A
Other languages
Japanese (ja)
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 JP3454278A priority Critical patent/JPS54127313A/en
Priority to US06/022,104 priority patent/US4233874A/en
Publication of JPS54127313A publication Critical patent/JPS54127313A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrophonic Musical Instruments (AREA)

Abstract

PURPOSE: To provide the octave sounds of the same envelope as that of original sounds by multiplying the sound source signals corresponding to the original sounds and the signals of the frequencies being changed over and selected according to octave numbers then negating the sound source signals and forming the musical tone signals.
CONSTITUTION: The sound source signals of original sounds having detected the number of vibrations of the musical instrument and the signals of the frequency higher or lower by a desired octave number than the frequencies of the sound source signals selected by a changeover switch 16 are respectively intensified of the specified frequencies and are removed of unneccessary higher harmonic waves in filters 19, 17, tence they are multiplized in a voltage control type amplifier 18. Thereby, the sound source signals are modulated by the signal of the selected octave number and the amplifier 18 generates the signals which are the same in envelope as the original sounds and in which the original sound frequency components and the frequency components of the selected octave number are contained. Hence, the musical tone signals of the same envelope as that of the original sounds and of the frequencies having been converted according to the desired octave number are formed by way of a sound source signal erasing circuit 21 which is constituted by operational amplifiers, etc. being applied with the sound source signals.
COPYRIGHT: (C)1979,JPO&Japio
JP3454278A 1978-03-25 1978-03-25 Electric musical instrument having octave changeover function Pending JPS54127313A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3454278A JPS54127313A (en) 1978-03-25 1978-03-25 Electric musical instrument having octave changeover function
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
JP3454278A JPS54127313A (en) 1978-03-25 1978-03-25 Electric musical instrument having octave changeover function

Publications (1)

Publication Number Publication Date
JPS54127313A true JPS54127313A (en) 1979-10-03

Family

ID=12417176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3454278A Pending JPS54127313A (en) 1978-03-25 1978-03-25 Electric musical instrument having octave changeover function

Country Status (1)

Country Link
JP (1) JPS54127313A (en)

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