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7468482 Piano sound source apparatus, method and program for piano sound synthesis  
Disclosed is a piano sound source apparatus for adding a piano sound source providing a plurality of sinusoidal oscillation frequencies and a noise source providing a plurality of noise oscillation...
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...
6137042 Visual display for music generated via electric apparatus  
A visual display is provide for music associated with a theremin or, in general, any space-controlled electric instrument. The theremin is a space-controlled electric instrument that produces an...
5194684 Method and apparatus for selective reduction of upper harmonic content in digital synthesizer excitation signals  
Variable frequency sawtooth waveforms are often utilized as an excitation signal in a digital musical synthesizer. A problem exists at lower sampling rates in such systems due to an aliasing...
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...
4408514 Electronic musical instrument having portaments property  
In a electronic musical instrument wherein a portamento is played by supplying the pitch voltage corresponding to a subsequently depressed key to a capacitor holding the pitch voltage corresponding...
4356753 Musical electro magnetic analog synthesizer controlled rocket engine  
A musical instrument combination including a rocket engine type combustion chamber and a system for firing it either by single drum beat control or by variable frequency control pulses. The effect...
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...
4343219 Delay line oscillator  
A two-phase, period-proportional voltage-controlled oscillator circuit is provided for clocking an analog delay line which can be used, for example, in an electronic musical instrument. The...
4342244 Musical apparatus  
A musical apparatus including a novel combination by which a musician may control the output of a musical synthesizer, while playing his own musical instrument in a normal manner. The musical...
4308779 Control waveform generators for electronic musical instruments  
In a control waveform generator for an electronic musical instrument of the type wherein the generator generates a control waveform adapted to control at least one of a tone pitch, a tone color and...
4306480 Electronic musical instrument  
An electronic musical instrument having a fret board and a plurality of conductive frets may be coupled to a resistance ladder of discrete resistive elements. A conductive wire or a plurality of...
4304162 Electronic musical instrument including improved vibrato  
In an electronic organ including at least two frequency controlled delay circuits controlled by varying frequency output signals from individual voltage controlled oscillators, an analog modulating...
4291604 Memory override system for programmed electronic synthesizer  
A programmable electronic musical synthesizer includes a memory controlling a plurality of parameter circuits according to a selected group of stored parameter signals for producing a desired...
4245539 Musical platform  
Apparatus for producing signals of varying volume and pitch which are functions of the magnitude and distribution respectively, of weight (or weights) placed upon a platform hinged at one corner...
4244261 Electronic keyboard musical instrument  
A manually operated pressure sensitive button assembly is arranged by the side of the keyboard on the top front panel of the instrument, each button being electrically and operationally coupled to...
4235141 Electronic apparatus  
An apertured insulating strip permits closing a circuit only at contact points defined by the apertures between a low resistance conductor and a high resistance conductor in an electronic circuit...
4228713 Programmable current source for filter or oscillator  
In order to tune the frequency characteristics of a filter or oscillator as an exponential function of the position of a note on a musical scale, a pulse stream with an exponentially scaled duty...
4207793 Variable rate portamento system  
A portamento system is disclosed for use with an electronic musical instrument, and particularly with a monotonic keyboard instrument which utilizes master oscillator/divider elements for tone...
4207791 Automatic tuning device  
An automatic tuning device for use in a synthesizer of an electronic musical instrument in which an error signal is produced corresponding to an output tone signal from each of a plurality of...
4206676 Electronic musical instrument with sequencer for automatic arpeggio performance  
An electronic musical instrument is provided with a keyboard circuit, a voltage-controlled tone signal generating circuit arrangement and a sequencer for sequentially coupling memorized pitch...
4203340 Electronic musical instrument  
An electronic musical instrument includes a tone signal generator whose operation is controlled by active electronic signal processing. The instrument includes both tone effect control means to...
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...
4179971 Pitch bend apparatus for electronic musical instrument  
A pitch bend apparatus for electronic musical instrument having a voltage-controlled oscillator that works as a tone generator is provided with a first variable resistor for operating the pitch...
4179969 Tone generator for electrical music instrument  
In a tone generating apparatus for an electrical music instrument having an array of switches corresponding to respective keys of a keyboard and which are selectively actuable by manipulation of...
4179968 Electronic musical instrument  
An electronic musical instrument comprises a circuits for generating two kinds of voltages of tone pitch voltages and control voltages both of which correspond to respective keys but are...
4178823 Portable electronic musical instrument  
An electronic musical instrument has a keyboard including a plurality of scale keys and a plurality of chord keys. Musical sounds are generated by a programmable frequency divider network capable...
4173164 Electronic musical instrument with frequency modulation of a tone signal with an audible frequency signal  
An electronic musical instrument comprises first and second voltage-controlled frequency-variable oscillators responsive to application of a pitch determining voltage signal from a keyboard circuit...
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 state...
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...
4121489 Electronic musical instrument having plural oscillators starting in phase  
An electronic musical instrument comprises a plurality of tone generators for independently producing tone signals having slightly different frequencies, though fundamentally corresponding to the...
4103581 Constant speed portamento  
A keyboard operated tone synthesizer with portamento effect in which each key controls the pitch of the generated tone through a table of frequency numbers, each key selecting a corresponding...
4098162 Synthesizer type electronic musical instrument  
An electronic musical instrument includes a pitch determining voltage signal generating circuit adapted to produce one of 12 pitch determining voltage signals having different magnitudes...
4096778 Apparatus for processing tone signals  
Apparatus for producing vibrato has several analog shift registers with at least 2 9 stages whose inputs receive tone signals from an electronic musical device such as an organ or guitar and are...
4067254 Frequency number controlled clocks  
In a musical polyphonic tone synthesizer, musical waveshapes are produced by voltage controlled oscillators. The analog frequency control voltages are created by converting stored digital numbers...
4054078 Automatic arpeggio electronic musical instrument  
An automatic arpeggio musical instrument includes a pulse generator having a plurality of keys for generating periodic pulses by depression of one of the keys, each of the keys generating a...
3991646 Arpeggio circuit for an electronic musical instrument  
An arpeggio circuit for an electronic keyboard instrument has means for generating a desired sweep voltage which is continuously varied, a voltage control type oscillator connected to the generator...
3991645 Electronic musical instrument with exponential keyboard and voltage controlled oscillator  
An electronic musical instrument includes an oscillator for generating a signal at a frequency corresponding to that associated with a depressed key of the keyboard. The key selects a control...
3902392 Electronic musical instrument of voltage-controlled tone production type  
An electronic musical instrument comprises a playing-board section for generating a voltage signal of one polarity by a depression on the board for determining a tone frequency corresponding to the...
3880039 Sample and hold circuit for an electronic organ  
A sample and hold circuit for an electronic organ, in which the voltage across a cascade of resistances, selected points of which may be caused to equal ground by key switch controlled logic...
3872764 SAMPLE AND HOLD CIRCUIT FOR AN ELECTRIC ORGAN  
A sample and hold circuit for an electric organ, in which the voltage across a cascade or resistances, selected points of which may be grounded by key switches of an electric organ, is maintained...
3871261 METHOD OF TUNING AN ELECTRONIC KEYBOARD INSTRUMENT IN PURE SCALE AND APPARATUS THEREFOR  
Method and apparatus for tuning an electronic keyboard instrument in pure scale are disclosed herein. The apparatus comprises frequency modifier means such as potentiometers which are electrically...
3859884 TONE GENERATOR  
A tone generator particularly adapted for operation and performance as a musical instrument in which the shape of a cycle of sound is selected by a digital decoder which is adjustable to a sign...
3837254 ORGAN PEDAL TONE GENERATOR  
Tone generator system including an oscillator comprising a capacitor and unijunction transistor, with pedals applying potentials representing different notes to a constant current source for...
3828110 CONTROL CIRCUITRY FOR ELECTRONIC MUSICAL INSTRUMENT  
In an electronic musical instrument of the type including a keyboard and a resistor voltage divider having points there along respectively coupled by way of actuable keys associated with the...
3828109 CHORUS GENERATOR FOR ELECTRONIC MUSICAL INSTRUMENT  
An electronic musical instrument has a plurality of frequency synthesizers for separately generating the musical tones of each octave. Each of the frequency synthesizers is supplied with a train of...
3828108 BINARY ORGAN AND CODING SYSTEM FOR OPERATING SAME  
A tone generating oscillator selectively generates any one of the twelve tones of the musical scale upon activation of a unique combination of four keys. Other keys are provided for generating the...
3825666 APPARATUS FOR TRANSMITTING THE OUTPUT OF A MUSICAL INSTRUMENT FOR AMPLIFICATION  
Apparatus for generating a signal from an electrical instrument includes two transistor amplifiers adapted to receive electrical signals from a transducer in the vicinity of the vibrations from the...
3800060 KEYNOTE SELECTOR APPARATUS FOR ELECTRONIC ORGANS  
An electronic organ keynote selection apparatus, for selectively altering the key to which the organ is tuned, may be employed in organs utilizing single voltage controlled master oscillator tone...
3789718 VOLTAGE CONTROLLED CHORD ORGAN  
An electronic chord organ, in which voltage controlled oscillators are each supplied with the same voltage, the voltage being selected by actuation of keys of an organ keyboard, and the currents...
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