JPS5466741A - Readout system of waveform memory - Google Patents

Readout system of waveform memory

Info

Publication number
JPS5466741A
JPS5466741A JP13391377A JP13391377A JPS5466741A JP S5466741 A JPS5466741 A JP S5466741A JP 13391377 A JP13391377 A JP 13391377A JP 13391377 A JP13391377 A JP 13391377A JP S5466741 A JPS5466741 A JP S5466741A
Authority
JP
Japan
Prior art keywords
memory
signal
amplitude
read out
waveform memory
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.)
Granted
Application number
JP13391377A
Other languages
Japanese (ja)
Other versions
JPS593759B2 (en
Inventor
Takatoshi Okumura
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 JP52133913A priority Critical patent/JPS593759B2/en
Publication of JPS5466741A publication Critical patent/JPS5466741A/en
Publication of JPS593759B2 publication Critical patent/JPS593759B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Electrophonic Musical Instruments (AREA)

Abstract

PURPOSE: To make easy circuit integration, by making small the circuit scale and low in cost, through the readout of the waveform memory memorizing a half of the symmetrical wave with the gray-coded address signal, in an electronic instrument.
CONSTITUTION: The waveform memory 30 memorized the amplitude from the sample point 0 to 15 of the half wave of a symmetrical wave. Further, the binary address signal AD is converted into the gray code in four-bit at the conversion circuit 31, and the address signal GAD of the output is fed to the memory 30 via the decoder 32. Futher, while the signal AD increases from the point 0 to 15, the corresponding amplitude is sequentially read out from the memory 30, and at the increase of the signal AD after that, the signal GAD is folded at the pioint 15 and the amplitude of the memory 30 is read out to reverse direction. Thus, the one period of the symmetrical wave is read out and repetitive read-out is performed.
COPYRIGHT: (C)1979,JPO&Japio
JP52133913A 1977-11-08 1977-11-08 Waveform memory read method Expired JPS593759B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52133913A JPS593759B2 (en) 1977-11-08 1977-11-08 Waveform memory read method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52133913A JPS593759B2 (en) 1977-11-08 1977-11-08 Waveform memory read method

Publications (2)

Publication Number Publication Date
JPS5466741A true JPS5466741A (en) 1979-05-29
JPS593759B2 JPS593759B2 (en) 1984-01-25

Family

ID=15116012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52133913A Expired JPS593759B2 (en) 1977-11-08 1977-11-08 Waveform memory read method

Country Status (1)

Country Link
JP (1) JPS593759B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55162297U (en) * 1979-05-09 1980-11-21
JPS58130388A (en) * 1982-01-29 1983-08-03 ヤマハ株式会社 Formation of musical sound waveform for electronic musical instrument
JPS61245196A (en) * 1985-04-24 1986-10-31 ヤマハ株式会社 Musical sound generation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55162297U (en) * 1979-05-09 1980-11-21
JPS58130388A (en) * 1982-01-29 1983-08-03 ヤマハ株式会社 Formation of musical sound waveform for electronic musical instrument
JPH0340400B2 (en) * 1982-01-29 1991-06-18
JPS61245196A (en) * 1985-04-24 1986-10-31 ヤマハ株式会社 Musical sound generation
JPH0582598B2 (en) * 1985-04-24 1993-11-19 Yamaha Corp

Also Published As

Publication number Publication date
JPS593759B2 (en) 1984-01-25

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