Systems and methods for simulation of mixing in air of recorded sounds
AssigneeAmOS DM, LLC
InventorGeorge William Daly
Life of this patent
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Abstract
A mixing signal processing technique modifies digital audio recordings to simulate the linear and nonlinear effects of propagation and mixing of sounds in air. When multiple sounds or complex sounds comprised of multiple frequencies in the audible spectrum propagate in such a nonlinear medium, they transfer energy into sound at new frequencies given by the sums and differences of the original signal frequencies. The mixing signal processing technique may improve the ability of a system to reproduce the effects of a live performance using a digital audio recording.
Claims14
A method for simulating propagation and mixing of sounds in air, the method comprising:
- selecting a relationship between a virtual audio listener location and a virtual source location within an audio interaction volume, the audio interaction volume associated with a first audio waveform, the first audio waveform including audio generated using a first audio isotropic source;
- and
- generating a second audio waveform using the first audio waveform, the second audio waveform including a plurality of simulated intermodulation products corresponding to the relationship between the virtual audio listener location and the virtual source location.
A system for simulating propagation and mixing of sounds in air, the system comprising:
- a digital signal processing mixing simulation module, the simulation module configured to:
- select a virtual source location within an audio interaction volume, the audio interaction volume associated with a first audio waveform, the first audio waveform including audio generated using a first audio isotropic source;
- select an observation location corresponding to a virtual audio listener location;
- and
- determine a second audio waveform using the first audio waveform, the second audio waveform including a plurality of simulated intermodulation products corresponding to the observation location;
- and
- a summing amplifier module configured to generate an output audio waveform, the output audio waveform including the first audio waveform and the second audio waveform.
Dependencies are inferred from the claim text.