Matches 151 - 200 out of 247 < 1 2 3 4 5 >
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4351212 Electronic musical instrument with equally spaced binary note codes  
An electronic musical instrument comprises a note code producer for producing note codes respectively having n bits representing juxtaposed notes aligned by a semitone interval step. The note codes...
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...
4338846 Remote control for electronic musical instrument equipment  
A manually operated switch located on an electric guitar controls a remotely located tuning device through the existing guitar cable. Preferably, the switch is located in an adaptor which plugs...
4335642 Stroboscopic tuning  
A stringed musical instrument is tuned by illuminating a portion of a vibrating string with a monochromatic stroboscopic light source. The illuminated string portion is viewed through a...
4331060 Musical instrument tuning device  
There is disclosed a new and improved device which facilitates the tuning of musical instruments to a standard frequency with speed and accuracy. The device includes an indicating means comprising...
4327623 Reference frequency signal generator for tuning apparatus  
A reference frequency generator for a tuning apparatus comprising a variable frequency divider which frequency divides a source signal in accordance with frequency division data stored in one or...
4324166 Tuning device for musical instruments  
A tuning device for musical instruments including a high frequency oscillator having frequency controlled by a tone select switch and an octave select switch and the output S H of which is...
4321853 Automatic ear training apparatus  
An electronic device for use in aiding the instruction of musical students. The device is comprised of a metronome and a plurality of tone generators, all under the control of a microprocessor...
4319515 Tuning aid for tuning musical instruments  
A tuning aid for tuning musical instruments, particularly keyboard instruments, includes a sensor unit (12) which has an elongate capacitative sensor probe which is capable of extending across one...
4313361 Digital frequency follower for electronic musical instruments  
In an electronic musical instrument apparatus is provided for generating musical sounds having a fundamental frequency which tracks the fundamental frequency of a time varying external control...
4312044 Tuning apparatus  
Tuning apparatus wherein the instantaneous deviations of a measured sound frequency from a reference sound frequency are averaged to display a mean deviation, thereby to improve the stability of...
4287806 Method and apparatus for tensioning a drum  
A method of tensioning a musical drum is disclosed using a device for torquing the tension rods of the drum. The device has a housing having a central aperture and a concentric upper recess. The...
4281577 Electronic tuning device  
An electronic tuning device provides four different modes of operation. In a first mode, the device sounds one of a plurality of internally generated audio frequency pitch standards that is...
4280387 Frequency following circuit  
A plurality of a signal peak detection circuits connected in cascade for operation on a complex waveform input signal, for generating a reference signal having peaks occurring in time with the...
4273023 Aural pitch recognition teaching device  
Apparatus including amplifier and peak-detecting circuits receives an electrical signal representative of an aural tone containing a pitch to be determined and produces therefrom a pulse train...
4271746 Automatic musical tuning device  
An electronic automatic musical tuning device whereby an incoming tone from a musical instrument is picked up by a microphone, amplified and transformed to a square wave signal and compared in a...
4256008 Musical instrument tuner with incremental scale shift  
Instant scale shifting by predetermined increments is provided in a musical instrument tuning device by means of a programmable phase locked loop and crystal-controlled oscillator combination. The...
4252048 Simulated vibrating string tuner  
A transducer produces an electrical signal representing the frequency of a tone produced by the vibrating string of a musical instrument. Circuit means convert the electrical signal into a visually...
4227437 Frequency detecting apparatus  
A detecting apparatus for tuning musical instruments receives an input signal from a sound transducer and removes second harmonic content therefrom by means of a filter responsive to a note and...
4217808 Determination of pitch  
Method and apparatus for determining pitch by establishing the fundamental period of an incoming acoustic wave and comparing this fundamental period with the period of certain standard...
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...
4196652 Digital electronic tuner  
A digital electronic tuning device is provided in which an arrangement of light-emitting diodes [LED's] or other display elements indicates when two frequencies are equal. If the frequencies are...
4163408 Musical tuning device  
A tuning device for use in tuning a musical instrument includes sensing means operable for sensing a first electrical signal having a certain frequency bandwidth and corresponding to an acoustical...
4144490 Electronic sensing and measuring apparatus for signals in audio frequency range  
Electronic sensing and measuring equipment for accurately measuring the pitch of musical sounds and which includes an audio tuner responsive to the fundamental frequency of a continuing signal...
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...
4122751 Automatic instrument tuner  
Switching means for automatically determining which note in the entire musical spectrum is closest to an input frequency and display means for generating a visual display of the frequency...
4120229 Electronic tuner  
An electronic tuner for musical instruments is disclosed which has built therein a voltage-controlled reference oscillator having its oscillation frequency controlled by a control signal and in...
4088052 String instrument tuning apparatus  
This disclosure pertains to an apparatus utilized to detect the pitch in a string instrument, comparing it with a known standard, and providing an output error signal to an audio amplifier which...
4078469 Instrument tuner  
Display means for electronically generating a visual display of the frequency difference between two frequencies, adaptable for the tuning of musical instruments. In the exemplary body of said...
4077298 Apparatus for automatically tuning an electronic musical instrument  
An apparatus for the automatic tuning of an electronic musical instrument comprising a phase comparator, a converter circuit connected to the comparator for converting an output signal of the phase...
4061071 Stroboscopic tuning device for musical instruments  
A stroboscopic tuning device for a stringed musical instrument that is mounted on the musical instrument adjacent to the strings to be tuned. A solid state circuit employs a frequency generator,...
4058044 Electrical musical instrument  
An electrical musical instrument is provided with a tone generator comprising a plurality of vibratory tone bars each supported with its both ends free. The tone bars are struck by key-actuated...
4041832 Tuning aids  
A musical instrument tuning aid includes a stable source of reference signals. Those signals are divided by a selected amount to produce a given tone signal. A note produced by an instrument under...
4041831 Instrument for tuning musical instruments  
An instrument for tuning musical instruments where a low difference frequency is derived between the instrument to be tuned and a reference frequency. The difference frequency signal is shaped to a...
4041783 System for measuring vibration frequency of vibrating object  
A system for measuring the vibration frequency of a vibrating object useful for the adjustment of the vibration frequency of a piano string or like vibrating objects. In this system, the vibration...
4038899 Musical instrument tuning apparatus  
Apparatus for turning a strobe wheel to assist in tuning a musical instrument. The apparatus features side-by-side rotary shafts, including a driving shaft and a driven shaft--the former having...
4028985 Pitch determination and display system  
An improved system for the determination of pitch or perceived frequency of signals generated by musical instruments or voices and for the display of the results in a format easily understood and...
D244482 Music tuner  
4024789 Tone analysis system with visual display  
An audible tone identifier comprises a transducer and amplifier for responding to audible tones, such as generated by a human voice speaking or singing, or a musical instrument, and a plurality of...
4023462 Musical instrument tuning device  
A musical instrument tuning device for tuning a musical instrument, having a vibrating sound producing member, is herein disclosed. The musical instrument tuning device includes a tone sensor,...
4019419 Tuning device  
A tuning device for musical instruments or voices comprises a visual stroboscopic displaying means which displays a light flow at a speed proportional to the difference of a tone to be tuned from...
4018124 Automatic guitar tuner for electric guitars  
An automatic guitar tuner for a standard six string electric guitar which includes a pick-up, a master crystal oscillator, and a tone generator for each string of the guitar. The pick-up feeds a...
4014167 Electronic metronome  
An electronic metronome with an oscillator for producing a signal of predetermined frequency and a variable divider connected to the oscillator for variably dividing the signal to a signal of lower...
4014242 Apparatus for use in the tuning of musical instruments  
A musical tuning aid. The tuning aid generates a digital note signal at the frequency of a selected partial of a note being sounded and combines this note signal and a four-phase digital clock...
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...
3968719 Method for tuning musical instruments  
A method for tuning a piano or other instrument. A characteristic stretch is measured using a tuning instrument which compares an internally generated reference signal and the corresponding partial...
3952625 Electronic tuning device  
An Electronic Tuning Device for tuning musical instruments employes a single radio frequency oscillator. Frequency dividers are used to divide the frequency of the radio frequency oscillator...
3948140 Portable device for generating and tuning a whole tone scale  
A portable device for generating and tuning a whole tone scale comprising means for generating a signal having a frequency of a reference tone scale, first means for shaping an output of the signal...
3937117 Composite tuning fork and method of making same  
There is disclosed a light modulating structure including an open-ended housing within which an electromagnetically driven tuning fork structure is supported. The tuning fork is of composite...
3919913 Method and apparatus for improving musical ability  
A pair of recordings are synchronously reproduced, wherein one such recording suitably comprises a musical selection with which a student may correlate a response, while the second recording...
Matches 151 - 200 out of 247 < 1 2 3 4 5 >