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| Number | Title | Issue Date |
| 7400734 | Method and apparatus for emulating audio effect The present invention provides an apparatus and a method for emulating audio. The apparatus comprises an echo device, a reverberation device, an audio source device and a first signal synthesizer. Wherein, the echo device receives an audio source signals and applies... | 07/15/2008 |
| 7369663 | Method of creating reverberation by estimation of impulse response The present invention is directed to creating sound reverberation. In accordance with a preferred embodiment, an apparatus estimates an impulse response for use in reproduction of a sound in a desired acoustic space. In particular, the apparatus collects space infor... | 05/06/2008 |
| 6580796 | Sound effect imparting apparatus Reverberation imparting functions as are obtained by a mechanical type reverberation apparatus employing coil spring delaying elements are simulated by an electric circuit configuration. Three delay loop circuits are individually provided, each including ... | 06/17/2003 |
| 6399868 | Sound effect generator and audio system A sound field effect adding apparatus is provided to add such effects as reverberation to the musical tone signal of an electronic organ and the like, and to produce a sound field effect. It is possible to create a satisfactory reproduced sound field to w... | 06/04/2002 |
| 6157724 | Apparatus having loudspeakers concurrently producing music sound and reflection sound A music apparatus is constructed for introducing a music sound into an acoustic space, and is equipped with an acoustic feedback system for introducing a reflection sound into the acoustic space. In the music apparatus, an input device sequentially provid... | 12/05/2000 |
| 6047073 | Digital wavetable audio synthesizer with delay-based effects processing A digital wavetable audio synthesizer is described. The synthesizer can generate up to 32 high-quality audio digital signals or voices, including delay-based effects, at either a 44.1 KHz sample rate or at sample rates compatible with a prior art wavetabl... | 04/04/2000 |
| 5939656 | Music sound correcting apparatus and music sound correcting method capable of achieving similar audibilities even by speaker/headphone A music sound correcting apparatus for correcting a music sound signal entered thereinto to selectively supply the corrected music sound signal to a speaker and a headphone, is provided with a jack into which a plug of the headphone is inserted, and a det... | 08/17/1999 |
| 5732142 | Musical sound reproduction controller with two-stage adjustment of tone A sound reproduction control apparatus processes an audio signal in reproduction of a musical sound to control a tone of the musical sound while imparting an effect to the musical sound. A preceding tone controller has a variable frequency response for am... | 03/24/1998 |
| 5552560 | Electronic keyboard musical instrument with multifunctional keyboard A keyboard musical instrument produces electronic sounds in synchronism with fingering on a keyboard, and a player can select an reverberation emvironment and a depth of reverberation through predetermined keys of the keyboard before the performance, ther... | 09/03/1996 |
| 5473697 | Echo generating apparatus An echo generating apparatus includes an echo effect generator for producing reverberative echo effect by delaying an input audio signal; a band limit filter for limiting the frequency band of the output signal of the echo effect generator; a first calcul... | 12/05/1995 |
| 5455380 | Electronic musical instrument altering tone sound effects responsive to number of channels or tone range An electronic musical instrument changes sound effects, such as resonance and reverberation, during a performance. The instrument has a tone-ON channel counter, for counting keys that are simultaneously depressed; an output channel determination unit, for... | 10/03/1995 |
| 5444784 | Acoustic signal processing unit A sound echo machine as an acoustic signal processing unit of the present invention comprising an adder to which an input signal is fed, and a delay circuit for delaying the signal fed from the adder for a certain time to repeatedly feed back to the adder... | 08/22/1995 |
| 5424487 | Sound effect-creating device A sound effect-creating device for imparting a sound effect to a musical tone produced by performance subjects an analog or digital signal indicative of the musical tone to reverberation processing over a predetermined reverberation time to add reverberat... | 06/13/1995 |
| 5333203 | Reverb and selectable tremolo and vibrato electron tube preamplifier A preamplifier device employing electron tubes wherein the preamplifier has tremolo/vibrato circuits independent from reverb circuits allowing continuously variable control of either tremolo or vibrato effects simultaneous with continuously variable contr... | 07/26/1994 |
| 5144096 | Nonlinear function generation apparatus, and musical tone synthesis apparatus utilizing the same A nonlinear function generation apparatus and a musical tone synthesis apparatus are disclosed. The nonlinear function generation apparatus comprises hysteresis and nonhysteresis function generators for generating hysteresis and nonhysteresis functions us... | 09/01/1992 |
| 5109419 | Electroacoustic system An electroacoustic system for acoustic enhancement of a room that includes a sound source location. The electroacoustic system includes a microphone spaced from the sound source location, an array of loudspeakers arranged in at least four interleaved bank... | 04/28/1992 |
| 5083311 | Sound field producing apparatus An apparatus for producing an improved sound field in an acoustic space. The apparatus comprises a signal source for producing a source signal. The source signal is applied to a loudspeaker for reproduction thereof. The source signal is also applied to a ... | 01/21/1992 |
| 5060270 | Reverberation circuit A reverberation circuit comprises an amplifier, attenuation circuit, a feedback component, and a delay circuit. The amplifier, delay circuit, and feedback component form a feedback loop. The amplifier amplifies an input signal supplied to an input termina... | 10/22/1991 |
| 4984276 | Digital signal processing using waveguide networks Disclosed is a signal processor formed using digital waveguide networks. The digital waveguide networks have signal scattering junctions. A junction connects two waveguide sections together or terminates a waveguide. The junctions are constructed from con... | 01/08/1991 |
| 4937875 | Audio signal processing apparatus An audio signal processing apparatus for digitally processing input audio signals according to the contents of a program for creating a given sound field. A basic program for creating a specific sound field is read from a first memory. The contents of the... | 06/26/1990 |
| 4909119 | Musical tone control system with a pedal for adding a musical effect to a musical tone An electronic musical instrument for causing a tone generator to generate a musical tone corresponding to a musical performance while controlling an envelope by operation of a pedal. An operated-amount signal generator is provided for detecting an operate... | 03/20/1990 |
| 4649786 | Electronic musical instrument An electronic musical instrument comprises a plurality of keyboards each having a plurality of keys, a control circuit for controlling a manner of tone production, and a musical tone production circuit responsive to respective depressed keys of respective... | 03/17/1987 |
| 4365533 | Musical instrument A new, performer played, real time, multitonal, multitimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key th... | 12/28/1982 |
| 4356751 | Electronic musical instrument An electronic musical instrument comprises a musical tone production circuit responsive to a depressed key among a plurality of keys, and a control circuit for controlling tone production manner which includes a plurality of manually operated members moun... | 11/02/1982 |
| 4338581 | Room acoustics simulator Room acoustics simulation is achieved by digitally defining delay and weighting parameters and generating sampled analog signal responses. In the early portion of a response term an accurate impulse response is provided and subsequently high echo density ... | 07/06/1982 |
| 4244262 | Echo-machine employing low pass filters with a variable cut-off frequency When the frequency of an input sound signal applied to a shifting type echo-machine is close to that of the shift pulse thereof, a false signal appears at the output terminal of the echo-machine, in addition to the other type of noise signal caused by inc... | 01/13/1981 |
| 4176579 | Circuit for simulating reverberation in electronic organs In an electronic organ system having a plurality of tone generators one for each note to be sounded, and a time constant circuit for establishing first and second decay characteristics for each note, the first of which has a longer decay period than the s... | 12/04/1979 |
| 4157511 | Electronic reverberation device An electronic reverberation device comprising an input amplifier and an output amplifier connected in a circuit in which a delay device is connected between an output of the input amplifier and an input of the output amplifier, and a feedback path connect... | 06/05/1979 |
| 4144790 | Choral generator A choral generator is formed from a plurality of delay channels, each including a modulated delay line which non-linearly varies the time delay imparted to a signal passing through it. The outputs of the delay channels are combined with the undelayed audi... | 03/20/1979 |
| 4005268 | Solid state echo producing system A solid state electronic system for producing a variable time delayed echo signal from a source of electro-audio input signals including circuitry for reducing noise. For low level signal operation, the system has means for varying the internal reference ... | 01/25/1977 |
| 3978421 | Electrical musical instrument amplifier having improved tremolo circuit, improved reverberation control, and power reduction circuit for distortion mode operation An electrical musical instrument amplifier is disclosed in which a signal which has been provided by an instrument to a second one of two different preamplifiers for amplification therein is passed to one of the inputs of a summing amplifier together with... | 08/31/1976 |
| 3968716 | Musical instrument with means for scanning keys A new, performer played, real time, multitonal, multimbral musical instrument consists of speed and force sensitive keys in which time domain multiplexing is used to find and associate one and only one tone generator, not otherwise busy, with any key that... | 07/13/1976 |
