JPS5466741A - Readout system of waveform memory - Google Patents
Readout system of waveform memoryInfo
- 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
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
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)
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 |
-
1977
- 1977-11-08 JP JP52133913A patent/JPS593759B2/en not_active Expired
Cited By (5)
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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