Patent ID: 8688249
Filing Date: 2014-04-01
Classification: H04R,H04S

Abstract:
1. A method comprising reproducing a stereo output signal having a left field and a right field and represented as digital samples, said stereo signal emulating the production of an audio signal from a virtual audio source location relative to a listening location, said listening location having a left listening position and a right listening position corresponding to the left and right ears of a typical listener; said method using audio playback equipment comprising a first input device, a second input device, a plurality of displaced left field loudspeakers and a plurality of displaced right field loudspeakers; and said method further comprising the steps of: receiving by said first input device a left channel signal and a right channel signal; produced by convolving an audio input signal with a left field broadband response file selected from a plurality of stored files derived from empirical testing and describing the impulse response of a left ear to a sound emitted from said indicated location; playing said left channel signal through each of said plurality of displaced left field loudspeakers; and playing said right channel signal through each of said plurality of displaced right field loudspeakers; wherein said left channel signal and said right channel signal are produced by way of the following process: receiving an audio input signal, an indication of the virtual audio source location, and an indication of the distance between the left listening position and the right listening position; determining said left and right listening positions, based on said listening location and said indication of distance determining a first direction from said indicated location to said left listening position and a second direction from said indicated location to said right listening position, wherein the indicated location is manually indicated or indicated in response to operation performed within a computer game; selecting a left field broadband response file describing the impulse response of a left ear to a sound emitted from said first direction; selecting a right field broadband response file describing the impulse response of a right ear to a sound emitted from said second direction; convolving said audio input signal with said selected left field response file to produce the left channel signal; convolving said audio input signal with said selected right field response file to produce the right channel signal.