JPS54127313A - Electric musical instrument having octave changeover function - Google Patents
Electric musical instrument having octave changeover functionInfo
- 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
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
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) |
-
1978
- 1978-03-25 JP JP3454278A patent/JPS54127313A/en active Pending
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