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GB1168110A - Keyboard Musical Instrument - Google Patents

Keyboard Musical Instrument

Info

Publication number
GB1168110A
GB1168110A GB179269A GB179269A GB1168110A GB 1168110 A GB1168110 A GB 1168110A GB 179269 A GB179269 A GB 179269A GB 179269 A GB179269 A GB 179269A GB 1168110 A GB1168110 A GB 1168110A
Authority
GB
United Kingdom
Prior art keywords
switch
capacitor
resistor
instrument
transistor
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.)
Expired
Application number
GB179269A
Inventor
Martha Tieland
Hendrik Van Der Horst
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB179269A priority Critical patent/GB1168110A/en
Publication of GB1168110A publication Critical patent/GB1168110A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
    • G10H1/057—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by envelope-forming circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1,168,110. Electronic musical instruments. M. TIELAND. 14 Oct., 1967, No. 1792/69. Divided out of 1,168,109. Heading G5J. A single transistor common-emitter amplifier is adapted to be switched on by a key of an electronic musical instrument and is provided with a split resistor in the collector of the transistor, the junction of which is connected to earth through a capacitor 62 whereby the rise and decay times of the note produced by the instrument when the key is actuated are determined. Terminals 53 and 54 provide for inputs from tone sources which are connected through resistors 55 and 56 to the base of the transistor 51. The instrument is provided with a plurality of keys which each switch one of a plurality of such amplifiers. The keys actuate switches 59 to switch each amplifier on and charge up the capacitor 62 through resistor 60 enabling the rise time to be determined by this time constant. When switch 59 is turned off the voltage across capacitor 62 decays through resistor 61 which is selected to give the required decay time for each note. The decay time can be increased using a switch 63 to bring resistor 64 and capacitor 65 into circuit. All the switches 63 in a plurality of similar amplifiers can be mechanically coupled together and operated by a master switch.
GB179269A 1967-10-14 1967-10-14 Keyboard Musical Instrument Expired GB1168110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB179269A GB1168110A (en) 1967-10-14 1967-10-14 Keyboard Musical Instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB179269A GB1168110A (en) 1967-10-14 1967-10-14 Keyboard Musical Instrument

Publications (1)

Publication Number Publication Date
GB1168110A true GB1168110A (en) 1969-10-22

Family

ID=9728091

Family Applications (1)

Application Number Title Priority Date Filing Date
GB179269A Expired GB1168110A (en) 1967-10-14 1967-10-14 Keyboard Musical Instrument

Country Status (1)

Country Link
GB (1) GB1168110A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees