JPS55160381A - Correction system for sound volume of automatic piano player - Google Patents
Correction system for sound volume of automatic piano playerInfo
- Publication number
- JPS55160381A JPS55160381A JP6772679A JP6772679A JPS55160381A JP S55160381 A JPS55160381 A JP S55160381A JP 6772679 A JP6772679 A JP 6772679A JP 6772679 A JP6772679 A JP 6772679A JP S55160381 A JPS55160381 A JP S55160381A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- supplied
- signal
- plunger
- rectangular wave
- 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 expand the dynamic range of a reproduced signal by providing a circuit which outputs a constant output signal putting an electromagnetic plunger into operation.
CONSTITUTION: A signal of a high-frequency range reproduced from a tape is supplied to comparing circuit 4 by way of rectifying circuit 1 and inverting amplifiers 2 and 3 and then converted into a rectangular wave by a saw-tooth signal supplied to one terminal of comparing circuit 4. Then, it is supplied to OR circuit Q5 via inverter 4. At this time, the minimum signal of the rectangular wave is set to a minimum value by which a plunger operates. On the other hand, comparator 5 outputs a rectangular wave of a constant minimum value by which the plunger operates and the wave is supplied to OR circuit Q5 via inverter Q7. Therefore, even if the output of inverter Q4 is small, the plunger is able to operate at any time. The circuit like this is provided even for a low-frequency range so as to rise a weak-sound part, so that the dynamic range can be expanded.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6772679A JPS55160381A (en) | 1979-05-31 | 1979-05-31 | Correction system for sound volume of automatic piano player |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6772679A JPS55160381A (en) | 1979-05-31 | 1979-05-31 | Correction system for sound volume of automatic piano player |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55160381A true JPS55160381A (en) | 1980-12-13 |
Family
ID=13353245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6772679A Pending JPS55160381A (en) | 1979-05-31 | 1979-05-31 | Correction system for sound volume of automatic piano player |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55160381A (en) |
-
1979
- 1979-05-31 JP JP6772679A patent/JPS55160381A/en active Pending
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