Method and system for artificial reverberation using modal decomposition
OwnerJonathan S. Abelinventor
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Abstract
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.
Claims13
A method implemented by a computer, comprising:
- receiving a source signal;
- applying, by the computer, artificial reverberation to the source signal by processing the source signal in parallel using a plurality of mode filters, wherein the plurality of mode filters have been designed in accordance with a source position associated with the source signal, wherein first amplitude values of the plurality of mode filters are designed in accordance with a first source position, and wherein second different amplitude values of the plurality of mode filters are designed in accordance with a second different source position, and wherein other parameters of the plurality of mode filters remain constant for both the first and second different source positions;
- and
- summing outputs of the plurality of mode filters to produce an artificially reverberated version of the source signal.
A method implemented by a computer, comprising:
- configuring parameters of a plurality of mode filters in accordance with desired properties of a room, the configuring including selecting a plurality of mode frequencies respectively corresponding to the plurality of mode filters using a measured impulse response of the room;
- receiving a source signal;
- applying, by the computer, artificial reverberation to the source signal by processing the source signal in parallel using the plurality of mode filters;
- and
- summing outputs of the plurality of mode filters to produce an artificially reverberated version of the source signal
- wherein at least one of the mode filters comprises one of a phasor filter, a first-order filter with a complex pole, a second-order resonant filter, a biquad filter or an operation of multiplication by a sinusoid.
Dependencies are inferred from the claim text.