CPC H04S 7/307 (2013.01) [G10L 21/0272 (2013.01); G10L 25/21 (2013.01); H04R 5/02 (2013.01); H04R 5/04 (2013.01); H04S 3/006 (2013.01); H04S 3/002 (2013.01); H04S 2400/01 (2013.01); H04S 2400/07 (2013.01); H04S 2400/13 (2013.01)] | 16 Claims |
1. A playback device comprising:
a plurality of audio drivers;
one or more processors;
tangible, non-transitory, computer-readable media storing instructions executable by the one or more processors, wherein the instructions, when executed, cause the playback device to perform operations comprising:
receiving a multi-channel audio signal comprising a set of audio channels;
for each channel in the set of audio channels, applying a low pass filter to the channel to obtain a low-frequency component of the channel comprising audio information below a threshold frequency;
combining the low-frequency component of each channel into a consolidated low frequency signal;
adjusting a gain of the consolidated low frequency signal to generate a gain-adjusted consolidated low frequency signal;
for each channel in the set of audio channels, mixing the gain-adjusted consolidated low frequency signal with audio content of the channel above the threshold frequency to generate a gain-adjusted channel;
playing the individual gain-adjusted channels via the plurality of audio drivers;
wherein the set of channels in the multi-channel audio signal comprises a left-channel audio signal, a center-channel audio signal, and a right-channel audio signal, and wherein for each channel in the set of audio channels, applying a low pass filter to the channel to obtain a low-frequency component of the channel comprising audio information below a threshold frequency comprises:
low pass filtering the left-channel audio signal to obtain a low-frequency component of the left-channel audio signal comprising audio information below the threshold frequency;
low pass filtering the right-channel audio signal to obtain a low-frequency component of the right-channel audio signal comprising audio information below the threshold frequency; and
low pass filtering the center-channel audio signal to obtain a low-frequency component of the center-channel audio signal comprising audio information below the threshold frequency.
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