Abstract: A digital electronic musical instrument which produces musical notes by approximately reproducing a waveshape based on information of points of extremal values on a musical waveshape, storing the approximate waveshape after sampling it with the number of the frequency at which the notes are to be produced and reading out the stored waveshape with a predetermined clock.

Abstract: A digital display type electronic watch, comprising a display having four or six digit display positions, two of which are adapted to selectively display the numeral or alphabet characters and the other of which are adapted to display the numeral characters, a current time information signal generator for generating an hour information signal and a minute information signal, a current date information signal generator for generating a day of the month information signal, a day of the week information signal and a month signal, a mode selector for selecting a current time display mode for displaying the current hour and minute by the display using the numeral characters in response to the hour and minute signals, a first current date display mode for displaying the current day of the week by the said alphanumeric character displaying positions of the display using the alphabet characters in response to the day of the week signal and a second current display date mode for displaying the current month by the sai

Abstract: An electronic musical instrument comprises an upper keyboard channel, a lower keyboard channel and a pedal keyboard channel. The lower keyboard channel includes a tone gate which is actuated by a chord rhythm pattern pulse generated by an automatic rhythm generator to gate the lower keyboard tones. The pedal keyboard channel includes a root/subordinate tone generator which provide a root tone designated by the depressed pedal key and subordinate tones related to the root tone with predetermined musical intervals, and a tone keyer which is actuated by a bass rhythm pattern pulse generated by the automatic rhythm generator to gate the bass tones.

Abstract: A driver circuit for a tone generator that is adapted to cause the tone generator to produce a pleasant sounding chime. The circuit comprises high and low frequency oscillator circuits whose decaying sawtooth type outputs are summed and modulated to produce the desired chime effect.

Abstract: An electronic musical instrument, in the nature of an organ, employs a plurality of endless magnetic tape cartridges, each continuously playing an endless magnetic tape stored therein, each endless tape having recorded thereon a continuous tone, and a keyboard arranged such that depression of a key causes the output of a selected tape cartridge to be played through a speaker system continuously for as long as the key is depressed.

Abstract: A CMOS-LSI including a time information keeping circuit and a display driver circuit is mounted on a flexible film substrate. An upper plastic housing and a bottom plastic housing are provided for tightly supporting the flexible film substrate through screws. That is, the flexible film substrate is sandwiched between the two plastic housings at the periphery thereof, thereby minimizing the flexibility of the flexible film substrate.

Abstract: A magnetic pickup for an electronic amplification system of a stringed musical instrument wherein the variable electrical signal produced in response to the string traversing the lines of flux from a permanent magnet is generated by a Hall effect sensor, thereby eliminating the usual inductively coupled coil(s). The invention is disclosed in embodiments employing bar and horseshoe magnets with the sensor positioned on the opposite or on the same side of the magnet as the string. The sensor is an essentially planar device which may be positioned in a plane substantially normal to the lines of flux in contact with or spaced a predetermined distance from the associated magnet or positioned in a plane non-perpendicular to the lines of flux, or adjustably positioned with respect to the direction of flux lines to achieve the desired degree of sensitivity.

Abstract: An electronic timepiece including a global time display that is adapted to display local time when the timepiece is in a local time mode and is adapted to be automatically indexed to display a time at a different time zone when the timepiece is in a global display mode is provided. A plurality of numerical display digits are provided for displaying time information and a plurality of visual indication display segments are disposed about the numerical display digits for selectively indicating a predetermined time zone corresponding to the time displayed by the numerical display digits. The mode select circuitry is provided for effecting a display of local time by the display digits and a local time zone by the visual indication display segments when the selection circuitry is disposed in a global time mode.

Abstract: The clock comprises a display substrate having hour, ten minutes and minute display members each constituted by a plurality of display digit openings which are arranged in the form of a letter 8, a light diffusion plate situated on the back of the display substrate and formed with a plurality of shutter guide openings corresponding to respective display members, a lamp house block positioned to the rear of the light diffusion plate and provided with a plurality of lamp openings corresponding to respective display members, a plurality of lamps received in the lamp openings, a frame for supporting the display substrate, the light diffusion plate and the lamp house block, a plurality of shutter units positioned to the rear of the lamp house block and extending to the front surface of the light diffusion plate, each shutter unit including a plurality of shutter members cooperating with the display digit openings for selectively opening and closing the same, and a plurality of cam control mechanisms associated wit

Abstract: This disclosure pertains to a digitalized music synthesizer functioning in the real time domain to continuously update, in an asynchronous manner, a continuing approximation of a desired waveform by utilizing its memory of the recent history of the operation of the keyboard of the apparatus. A real time clock and a microcomputer are both driven by a single crystal oscillator, operating at any arbitrary frequency that need not correspond with the frequency of the fundamental or harmonic waves to be produced by the apparatus. A memory of the recent history of keyboard events is maintained. The microcomputer utilizes an algorithm employing square waves as a basis and a differential correcting technique which minimizes the quantity of square wave defining terms that need be computed by only recomputing at each time, corrections to the previous computation.

Abstract: A simplified, mechanical analog to digital converter mechanism useful in clocks or the like includes an impulse wheel periodically actuated by the continuous rotation of a conversion wheel coupled to a drive means such as a synchronous motor. The conversion wheel has a single tangential tang struck from its planar surface which functions on each wheel revolution to engage and advance a tooth of the impulse wheel one step. A uniform shaft rotation is thereby converted to a succession of digital steps, for example, a sweep seconds hand is converted to a jump seconds indicator.

Abstract: A tone synthesizer in which a musical tone of selected fundamental frequency is generated with a resonance effect at selected harmonics of the tone. The resonance effect is produced by adding an amplitude modulated carrier signal to the musical tone, the carrier signal being modulated by a signal having the fundamental frequency of the musical tone and the carrier frequency being an integral multiple of the fundamental.

Abstract: A timepiece provided with a display device for warning a battery life is disclosed. The timepiece comprises a correction signal control circuit which is controlled by two exteriorly operable switches and which control a battery voltage detection circuit whose sampling operation together with the warning display are interlocked with the operation of one of the exteriorly operable switches which functions as a digit selection switch, correction switch and display change-over switch. A warning display for a short time can be noticed by a bearer by operating the exteriorly operable switch without fail.

Abstract: There is disclosed a method and apparatus for recording digital signals subsequent re-creation of a musical performance from the keyboard of an electronic player piano, wherein the notes are given a stretched effect before recording so as to eliminate the sharpness and mechanical sounding of such music during the re-creation of the performance.

Abstract: There is disclosed a method and apparatus for encoding of expression while recording from the keyboard of an electronic player piano wherein the intensity of the music being recorded is reflected in variations in the power of the acoustic waveform produced thereby. There is a delay between the time the key is struck and the time that the note is sounded or heard by the listener. The apparatus measures the changes in power by performing a digital integration of a waveform. The key note or key switch actuations are multiplexed and a serial bit stream of data and stored in a shift register and then combined with the expression data bits to form the data stream which is encoded in a bi-phase encoder to be recorded on tape.

Abstract: This clock consists primarily of a main body to which is attached an air connection, on one end. Within the main body is a toothed piston rotor with spaced-apart indentations that removably receive a pair of drive screws in the base of the main body. The piston rotor is spring loaded on a central shaft, and a toothed cap is pinned in the bore of the main body. When air enters the main body, the piston rotor, the shaft and the hour hand are forced up, and the teeth turn this unit twenty-two degrees. When the air is turned off, the spring returns this unit to the base and forces the unit onto the drive screws of the main body, which turns the unit another eight degrees. This cycle advances the hour hand one hour, which is indicated by means of the radially spaced drive screws in the toothed cap.

Abstract: An electronic musical instrument is of a type wherein musical tone waveforms are stored in a memory as their sampled amplitudes and sequentially and repetitively read out to constitute tone waveforms. A key depression brings forth key code in a digital representation. This key code is used for reading out frequency information from a frequency information memory. The frequency information is accumulated to make an address signal for reading out the waveform memory.When a key is depressed, a counter starts counting and opens a gate for a predetermined period of time. The gate passes a code representative of an interval of a grace note with respect to the note of the depressed key (i.e. principal note) to an addition and subtraction circuit for addition or subtraction between the key code and the code representative of the interval for the grace note. Accordingly, the key code is modified and the desired grace tone is produced.

Abstract: A circuit provides a ramp voltage for purposes of controlling simultaneously a pair of transistors from saturation to cutoff and vice versa. Means are provided for generating an electronic strike and chime tone which is connected both to an amplifier circuit and the transistor controlled to cutoff. A tuner circuit which is part of the radio to provide a radio tone likewise is connected both to the amplifier and the transistor controlled to saturation. The circuit is provided with an enabling input at an alarm time and by dissipating the tones by varying percentages as the transistors change their state, a crescendo-decrescendo action may be obtained.

Abstract: A circuit structure for an electronic watch including a metallic lead plate which is overlapped on a circuit base plate and circuit case is provided. The metallic lead plate and circuit base plate are formed with receiving openings in regions of the circuit base plate requiring electrical connections and electronic elements for receiving projections formed on the circuit case for securing the lead plate and circuit base plate to the circuit case. The circuit base plate and circuit case are formed with cutting openings corresponding to portions of the lead plate to be cut through the cutting openings whereby the unsecured portion of the lead plate may be removed.

Abstract: Disclosed herein is a new and unique type of circuit control for an electric guitar. Simply stated, it varies the resonant frequency of the pickup itself in addition to filtering out frequencies which are suppressed or rolled off. The mechanism by which this is brought about includes a potentiometer connected to a center tap of the coil assembly.