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7365263 Intonation training device  
An intonation training device for training musicians in just intonation. As disclosed, the device is a pocket-sized portable device with an audio output and a user interface which includes an LCD...
6140569 Memory reduction method and apparatus for variable frequency dividers  
Method and apparatus reduce the memory capacity needed to store control codes used to obtain specified frequency values that represent musical tones with a predetermined relationship. The...
4934239 One memory multi-tone generator  
An electronic tone generator includes a signal-generating oscillator, a memory circuit for storing tone and time data for each note to be produced and two note producing circuits, each including a...
4901615 Electronic musical instrument  
A double buffer system of a small storage capacity is employed for reducing the noise generation in musical waveforms. The operations of the buffers are utilized for performing an interpolation...
4864245 Modification unit for an amplifier  
A modification unit for a musical instrument amplifier includes a modification circuit and a connector for connecting the modification circuit to a tube socket in place of one of the tubes in the...
4701956 Tone signal processing device  
A digital filter is provided between a tone signal generation circuit which supplies a digital tone signal in accordance with a first sampling frequency and a sampling circuit which resamples this...
4699518 Musical scale generating circuit  
A musical scale generating circuit comprises an oscillator, a programmable frequency divider for frequency-dividing an output signal from the oscillator, a tone generating circuit for generating a...
4537108 Electronic musical instrument having variable frequency dividers  
An electronic musical instrument comprising a code generator responsive to the operation of each of the keys for generating a first code indicating a tone pitch and a second code indicating an...
4508000 Frequency-selectable signal generator  
Disclosed is a frequency-selectable signal generator in which a numeric datum is parallel-transferred to a full adder circuit repeatedly under the control of clock pulse signals, thereby...
4498363 Just intonation electronic keyboard instrument  
A just intonation electronic keyboard instrument comprises a plurality of tonality selection switches for selecting each key from among twenty-four just intonation keys, a control circuit for...
RE31821 Variable function generator  
A fully digitalized function-of-time generator suitable for use as a tone envelope generator in a digital electronic musical instrument, comprising: a clock pulse generator for generating a clock...
4481852 Sound generating circuit for timepiece  
A sound generating circuit for a timepiece including a sound base signal generator, a program divider, a dividing ratio selecting counter a sound interval base signal generator and a sound...
4434696 Instrument for comparing equal temperament and just intonation  
Equal-ratio scales offer a choice of semitone accuracies ranging from a thousandth cent to a millionth of a cent, any note of which may be selected as a reference for a fully chromatic...
4428267 Digital semiconductor circuit for an electronic organ  
A digital semiconductor circuit for an electronic organ has a plurality of control inputs addressed via a keyboard and corresponding in number to the number of keys of the organ keyboard, and a...
4409877 Electronic tone generating system  
A tone generating system for an organ comprises a first group of tone generators for producing notes of a first chromatic scale and second group of tone generators for producing notes of a second...
4364296 Electrical musical instrument  
An electronic piano includes a tone generator having a pulse generator and a discrete TOS circuit for each octave. The input of the first TOS circuit is connected with the pulse generator and the...
4358982 In tone generators for electronic musical instruments  
A tone generator for electronic musical instruments, useful in particular for the modular composition of an electronic organ, comprising a plurality of inputs corresponding to a keyboard octave of...
4357850 Tone generator system for electronic musical instruments  
A tone generator system for electronic musical instruments includes a voltage-regulated, high-frequency oscillator. The output of the oscillator is connected with the inputs of first and second...
4350073 Hybrid pipe organ with electronic tonal augmentation  
A hybrid organ is disclosed wherein many of the musical tones comprising the complete musical instrument are produced by wind blown pipes. Other tones are produced by an electronic tone generating...
4338844 Tone source circuit for electronic musical instruments  
A tone source circuit for electronic musical instruments, in which a unit phase coefficient corresponding to a note code required by a key depression is read out from a phase coefficient memory of...
4319511 Tone source for an electronic musical instrument  
A tone source circuit for electronic musical instruments which enables the selection of a desired one of a plurality of waveshapes of different duty ratios and is suitable for fabrication as an...
4297935 Divider keyer circuit for synthesis organ  
A divider keyer circuit arrangement for a synthesis organ utilizing four integrated circuit chips to generate the notes for a 61 key manual with 9 harmonic drawbacks or tabs. On-chip cross wiring...
4287804 Electronic musical instrument with timbre selection  
A timbre-select type electronic musical instrument in which the application of a sound effect unsuitable for the selected timbre is automatically blocked. This instrument includes means for...
4256002 Large scale integrated circuit generator chip for electronic organ  
In an electronic organ or the like constructed of a plurality of large scale integrated circuit (LSI) chips, the present disclosure relates to a generator chip. The chip is operative over one...
4253366 Large scale integrated circuit chip for an electronic organ  
In a modular, expandable organ system comprising a plurality of large scale integrated circuit (LSI) chips an LSI chip is provided which produces chord and bass frequency generation and...
4248123 Electronic piano  
An electronic musical instrument using continuous tone generators capable of simulating the sounds of a conventional acoustical piano. The instrument includes a gating circuit featuring a timed...
4242935 Musical tone generator system using multiple frequency synthesizers  
For generating tones in an electronic musical instrument, there are provided multiple master frequency sources, a different source for each octave, differing in frequency from each other by a...
4240318 Portamento and glide tone generator having multimode clock circuit  
A musical instrument tone generator comprises a clock circuit including means for developing an interval code representing the number of musical intervals to be swept by a tone signal. An output...
4233874 Frequency conversion system of tone signal produced by electrically picking up mechanical vibration of musical instrument  
An octave conversion system of the fundamental frequency of an audible tone signal produced by electrically picking up mechanical vibration of a musical instrument in which the audible tone signal...
4228717 Electronic musical instrument capable of generating a chorus sound  
The disclosure describes improved apparatus for use in an electronic musical instrument having a keyboard including a group of keys corresponding to the notes of a musical scale. Electronic...
4226154 Electronic musical instrument  
An electronic musical keyboard instrument has a unit separate from the main console and having switching means for performing the function of at least some of the keys and stops of the console...
4208940 Device for producing an ensemble effect  
A device for producing an ensemble effect in an electronic musical instrument. The device has a plurality of parallel electronic delay circuits adapted to be supplied with a musical tone signal,...
4203337 Large scale integrated circuit chip for an electronic organ  
In a modular, expandable organ system comprising a plurality of large scale integrated circuit (LSI) chips an LSI chip is provided which produces frequencies corresponding to notes played on an...
4202235 Electronic musical box  
An electronic musical box is disclosed in which a musical score can be readily stored and reproduced and the musical score can be easily changed to another. The musical box includes a pulse...
4196651 Non-redundant generator unlocking  
An electronic organ or the like is provided with a plurality of frequency generators greatly less than the number of keys on the organ. Each generator is capable of producing an electrical...
4176574 Frequency divider for tone source apparatus for Arabian scale in electronic organ  
A frequency divider for a tone source for an Arabian scale in an electronic organ of the type wherein musical tone signals for a standard musical scale, musical tone signals higher than the same...
4173916 Tone generator system for an electronic organ  
A tone generator system for an electronic organ which is capable of being fabricated into an LSI structure and receives a saw-tooth wave or staircase wave as an input thereto comprises a frequency...
4173163 Tone generator for electronic organ  
A method and apparatus for generating tones for an electronic organ in which a number of oscillators less than the tones in a scale are provided with the outputs thereof divided by selected...
4170160 Electronic musical instrument  
An electronic musical instrument includes a linear voltage divider network including a plurality of equal series resistance elements for generating a first output voltage as a function of the...
4168645 Electronic musical instrument  
A voice-controlled electronic musical instrument provides tones responsive to audible energy imparted to a microphone. An analog voltage representative of the frequency of the audible energy...
4152964 Keyboard controlled just intonation computer  
A keyboard controlled just intonation computer for electronic organs which automatically responds to correct the larger tuning errors of equal temperament as each interval or chord is played. The...
4144581 Audio signal processor  
Random audio signals are converted into sine-waves of corresponding frequency and duration, and harmonics are derived from the sine-waves. The harmonics are controllably attenuated and selectively...
4142434 Circuit arrangement for electronic musical instruments  
In an electronic musical instrument with two tone generators of which the frequency of the tones produced by them is substantially constant for the first generator a priori and for the second...
4117759 Apparatus for forming chord signal  
An arrangement for forming a musical chord signal in which there are provided a frequency divider for root, a frequency divider for minor third, a frequency divider for major third and a frequency...
4116102 Integrated circuit for an electronic musical instrument  
The present invention is an integrated circuit for an electronic musical instrument comprising: a plurality of frequency divider chains receiving a plurality of input signals for dividing the...
4085645 Instantly retunable tone generator for an electronic musical instrument  
DC programmable counters with DC switching provide instant retuning of an entire keyboard of a programmable electronic musical instrument to any one of a plurality of different scales.
4084471 Circuit arrangement for obtaining a chorus effect  
A circuit arrangement for generating the tones of a tonal scale includes a master oscillator and a number of sets of frequency converters. The output signals of each set of frequency converters...
4063484 Method and apparatus for generating tone signals for a musical instrument  
A method and apparatus for generating tone signals for a musical instrument, especially an electronic organ, in which a stable high frequency source which is equal in frequency to that of a...
4056995 Single master tone generator  
An electronic organ in which all the tones of the musical gamut are obtained by operations on the output of a single tone signal source, utilizing digital techniques to divide the frequency of the...
4056032 Musical apparatus  
A pitch changing apparatus shifts the absolute pitch of musical output from an electronic organ. The apparatus combines two or more transposing switches in a cascade arrangement. In the preferred...

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