JPS54151020A - Sound source circuit of electronic musical instruments - Google Patents
Sound source circuit of electronic musical instrumentsInfo
- Publication number
- JPS54151020A JPS54151020A JP6046278A JP6046278A JPS54151020A JP S54151020 A JPS54151020 A JP S54151020A JP 6046278 A JP6046278 A JP 6046278A JP 6046278 A JP6046278 A JP 6046278A JP S54151020 A JPS54151020 A JP S54151020A
- Authority
- JP
- Japan
- Prior art keywords
- scale
- sound source
- circuits
- circuit
- frequency
- 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
Abstract
PURPOSE: To obtain the stable sound source circuit which reduces scale errors of upper and lower keyboards and produces the vibrato tone by the absolute scale free from the effect of change with time by locking the frequency of the scale reference signal with parallel phase locked loop circuits.
CONSTITUTION: The frequencies of the scale reference signal outputted by a high frequency generating circuit 31 are locked by the parallel connected phase locked loops for upper and lower keyboards formed by the frequency converting circuits 35, 45 which are respectively feedback-connected to phase comparators 32, 43, LPFs 34, 44, circuits 32, 43. Hence, the scale errors of the upper and lower keyboards become small and at the same time the circuit 31 becomes the stable sound source circuit which hardly receives the effect of the deviations of the absolute scale and change with time as the use of crystal oscillators, etc. for said circuit becomes possible. Further, if disturbances are given to the locked frequencies of the scale signal by the frequency variable low frequencies outputted by the low frequency oscillating circuits 32, 44 by closing switches SW3, SW4, the vibrato tone is formed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6046278A JPS54151020A (en) | 1978-05-18 | 1978-05-18 | Sound source circuit of electronic musical instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6046278A JPS54151020A (en) | 1978-05-18 | 1978-05-18 | Sound source circuit of electronic musical instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54151020A true JPS54151020A (en) | 1979-11-27 |
Family
ID=13142950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6046278A Pending JPS54151020A (en) | 1978-05-18 | 1978-05-18 | Sound source circuit of electronic musical instruments |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54151020A (en) |
-
1978
- 1978-05-18 JP JP6046278A patent/JPS54151020A/en active Pending
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