JPS54127302A - Frequency conversion system - Google Patents
Frequency conversion systemInfo
- Publication number
- JPS54127302A JPS54127302A JP3454178A JP3454178A JPS54127302A JP S54127302 A JPS54127302 A JP S54127302A JP 3454178 A JP3454178 A JP 3454178A JP 3454178 A JP3454178 A JP 3454178A JP S54127302 A JPS54127302 A JP S54127302A
- Authority
- JP
- Japan
- Prior art keywords
- sound source
- signals
- signal
- frequency
- amplifier
- 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 form the musical tone signals of the same envelope as that of sound source signals and converted frequencies by multiplying the sound source signals and the signals having frequency modulated the sound source signals.
CONSTITUTION: The mechanical vibrations of the musical instrument are detected with a pickup and are made to the sound source signal of a basic frequency fi. This signal is then applied to a voltage control type amplifier 14. On the other hand, the sound source signal is made to the modulating signal of m/m (m, n are natural numbers) of the frequency fi by passing through a clipper circuit 16 and a frequency dividing circuit 17 and is then applied to an amplifier 14. These both signals are multiplied by the amplifier 14 to be made to the musical tone signal whose frquency has become m/n times that of the sound source signal with no change in envelope waveform, thus the musical tone signal of the same envelope as that of the original tones and the frequencies converted higher or lower by a desired octave number may be formed with the simple constitution.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3454178A JPS54127302A (en) | 1978-03-25 | 1978-03-25 | Frequency conversion system |
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 |
---|---|---|---|
JP3454178A JPS54127302A (en) | 1978-03-25 | 1978-03-25 | Frequency conversion system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54127302A true JPS54127302A (en) | 1979-10-03 |
Family
ID=12417146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3454178A Pending JPS54127302A (en) | 1978-03-25 | 1978-03-25 | Frequency conversion system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54127302A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008302932A (en) * | 2008-09-22 | 2008-12-18 | Hitachi Ltd | Vehicle body mounting system of underfloor electric part for railway vehicle |
-
1978
- 1978-03-25 JP JP3454178A patent/JPS54127302A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008302932A (en) * | 2008-09-22 | 2008-12-18 | Hitachi Ltd | Vehicle body mounting system of underfloor electric part for railway vehicle |
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