JPS54151020A - Sound source circuit of electronic musical instruments - Google Patents

Sound source circuit of electronic musical instruments

Info

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
Application number
JP6046278A
Other languages
Japanese (ja)
Inventor
Yoji Sugiura
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP6046278A priority Critical patent/JPS54151020A/en
Publication of JPS54151020A publication Critical patent/JPS54151020A/en
Pending legal-status Critical Current

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
JP6046278A 1978-05-18 1978-05-18 Sound source circuit of electronic musical instruments Pending JPS54151020A (en)

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)

Similar Documents

Publication Publication Date Title
ATE219612T1 (en) PLL FREQUENCY SYNTHESIZER CONTROLLED BY A DIRECT DIGITAL SYNTHESIZER WITH A CLEAN-UP PHASE LOCKED LOOP
DE68916831D1 (en) Arrangement for harmonic speech coding.
DE69030794D1 (en) Frequency synthesizer for a generator for generating signals of high purity as well as associated circuit elements such as VCO, PLL and signal generator
FI900303A (en) INTERPOLERANDE PLL- FREQUENCY SYNTHESIS.
JPS54151020A (en) Sound source circuit of electronic musical instruments
JPS5263317A (en) Electronic musical instrument
JPS54136317A (en) Electronic musical instrument
JPS54151019A (en) Sound source circuit of electronic musical instruments
JPS54143621A (en) Electronic musical instrument
JPS54107722A (en) Electronic musical instrument
JPS5332011A (en) Sound source apparatus for electronic musical instrument
JPS54107720A (en) Electronic musical instrument
JPS55163482A (en) Time standard generator
JPS54121724A (en) Musical tone former of electronic musical instruments
ATE75084T1 (en) OSCILLATOR DEVICE FOR GENERATION OF AT LEAST TWO DIFFERENT FREQUENCIES.
JPS52137319A (en) Electronic musical instrument
GB1286128A (en) Signal processing arrangement for an electronic musical instrument
JPS5333114A (en) Beat effect generator
JPS549616A (en) Sound source apparatus of electronic musical instruments
JPS53149312A (en) Electronic musical instrument
JPS5456412A (en) Sound source system of electronic musical instruments
GB2002982A (en) Quartz crystal timepiece
JPS57190231A (en) Tuning device
Simes An Almost Locked Oscillator for Electronic Music Synthesis
JPS5229211A (en) Vibrato effect unit of electronic musical instrument