A keyless synthesizer t can stimulate all three senses (hearing, muscle movement and visual) at once in patients born with C.H.A.R.G.E. syndrome while they play and, at the same time, enjoy and have fun with the device. A keyless synthesizer operational by a single hand of the user includes an ultrasound range sensor responsive to the distance “d” of a user's hand from the sensor for generating a sensor signal corresponding to the distance “d”. A programmable microcontroller programmed to convert the sensor signal to one of a plurality of discrete signals. A synthesizer is responsive to each discrete signal for generating a discrete tone. A multi-color generator is responsive to each discrete signal for generating a discrete color so that for each discrete signal corresponding to a distance “d” both a discreet tone and an associated discreet color are generated.

A keyless synthesizer t can stimulate all three senses (hearing, muscle movement and visual) at once in patients born with C.H.A.R.G.E. syndrome while they play and, at the same time, enjoy and have fun with the device. A keyless synthesizer operational by a single hand of the user includes an ultrasound range sensor responsive to the distance “d” of a user's hand from the sensor for generating a sensor signal corresponding to the distance “d”. A programmable microcontroller programmed to convert the sensor signal to one of a plurality of discrete signals. A synthesizer is responsive to each discrete signal for generating a discrete tone. A multi-color generator is responsive to each discrete signal for generating a discrete color so that for each discrete signal corresponding to a distance “d” both a discreet tone and an associated discreet color are generated.

Preparing a sum of complex exponentials in the form of a modal filter to approximate a given impulse response is considered, and a non-iterative solution is described. In one embodiment, the mode count, and the mode frequencies, dampings, and amplitudes are estimated using the generalized eigenvalues of Hankel matrices of samples of the given impulse response.

Preparing a sum of complex exponentials in the form of a modal filter to approximate a given impulse response is considered, and a non-iterative solution is described. In one embodiment, the mode count, and the mode frequencies, dampings, and amplitudes are estimated using the generalized eigenvalues of Hankel matrices of samples of the given impulse response.

Methods and systems for generating oscillatory timbres for musical synthesis through synchronous ring modulation are described. An example method performing hard synchronization comprising using first and second oscillators, the first oscillator being a fundamental oscillator which provides a fundamental frequency, the second oscillator being a modulation oscillator operable at a frequencies higher than the first oscillator; and in response to the fundamental oscillator completing its cycle, synchronizing the modulation oscillator to the original point of its waveform. Ring modulation may be performed on the synchronized output by multiplying it by a waveform of the fundamental oscillator, such that the ring modulation is synchronized to produce a variety of oscillatory timbres. The method can create a variety of unique sounds having musically pleasing characteristics. A real-time audio signal can be used instead of the first oscillator to produce dynamically varying timbres.

Methods and systems for generating oscillatory timbres for musical synthesis through synchronous ring modulation are described. An example method performing hard synchronization comprising using first and second oscillators, the first oscillator being a fundamental oscillator which provides a fundamental frequency, the second oscillator being a modulation oscillator operable at a frequencies higher than the first oscillator; and in response to the fundamental oscillator completing its cycle, synchronizing the modulation oscillator to the original point of its waveform. Ring modulation may be performed on the synchronized output by multiplying it by a waveform of the fundamental oscillator, such that the ring modulation is synchronized to produce a variety of oscillatory timbres. The method can create a variety of unique sounds having musically pleasing characteristics. A real-time audio signal can be used instead of the first oscillator to produce dynamically varying timbres.

Preparing a sum of complex exponentials in the form of a modal filter to approximate a given impulse response is considered, and a non-iterative solution is described. In one embodiment, the mode count, and the mode frequencies, dampings, and amplitudes are estimated using the generalized eigenvalues of Hankel matrices of samples of the given impulse response.

Preparing a sum of complex exponentials in the form of a modal filter to approximate a given impulse response is considered, and a non-iterative solution is described. In one embodiment, the mode count, and the mode frequencies, dampings, and amplitudes are estimated using the generalized eigenvalues of Hankel matrices of samples of the given impulse response.

In general, the present invention relates to a method and system for synthesizing artificial reverberation using modal analysis of a room or resonating object. In one embodiment of the inventive system, a collection of resonant filters is employed, each driven by the source signal, and their outputs summed. With filter resonance frequencies and dampings tuned to the modal frequencies and decay times of the acoustic space or resonating object being simulated, and filter gains set according to the source and listener positions within the space or object, any number of acoustic spaces and resonant objects may be simulated.

In general, the present invention relates to a method and system for synthesizing artificial reverberation using modal analysis of a room or resonating object. In one embodiment of the inventive system, a collection of resonant filters is employed, each driven by the source signal, and their outputs summed. With filter resonance frequencies and dampings tuned to the modal frequencies and decay times of the acoustic space or resonating object being simulated, and filter gains set according to the source and listener positions within the space or object, any number of acoustic spaces and resonant objects may be simulated.