JPS55160381A - Correction system for sound volume of automatic piano player - Google Patents

Correction system for sound volume of automatic piano player

Info

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
Application number
JP6772679A
Other languages
Japanese (ja)
Inventor
Tadashi Kubodera
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.)
Marantz Japan Inc
Original Assignee
Marantz Japan Inc
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 Marantz Japan Inc filed Critical Marantz Japan Inc
Priority to JP6772679A priority Critical patent/JPS55160381A/en
Publication of JPS55160381A publication Critical patent/JPS55160381A/en
Pending legal-status Critical Current

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
JP6772679A 1979-05-31 1979-05-31 Correction system for sound volume of automatic piano player Pending JPS55160381A (en)

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)

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