Lines Matching +full:playback +full:- +full:channels

2 .\" Copyright (c) 2009-2011 Joel Dahl <joel@FreeBSD.org>
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49 and provides PCM audio record and playback once it attaches.
60 driver are: multichannel audio, per-application
61 volume control, dynamic mixing through virtual sound channels, true full
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118 .Xr snd_uaudio 4 (auto-loaded on device plug)
145 .Bl -tag -width ".Va snd_driver_load" -offset indent
164 To define default values for the different mixer channels,
174 multichannel matrix processor supports up to 18 interleaved channels, but the
175 limit is currently set to 8 channels (as commonly used for 7.1 surround sound).
177 re-routing of channels.
188 to adjust the number of channels used.
198 Commonly used for ear-candy or frequency compensation due to the vast
204 Each device can optionally support more playback and recording channels
206 .Dq virtual channels
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262 .It -1
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324 Technically the quality is poor however, due to the lack of anti-aliasing
364 Global VCHAN setting that only affects devices with at least one playback or
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391 The number of playback, record, virtual channels, and
412 when applications tries to re-open the same device.
426 When enabled, channels will skip all dsp processing, such as channel
444 All playback paths will be converted to this format before the mixing
446 By default only 2 channels are enabled.
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452 Stereo, 2 channels (left, right).
454 3 channels (left, right, LFE).
456 3 channels (left, right, rear center).
458 Quadraphonic, 4 channels (front/rear left and right).
460 5 channels (4.0 + LFE).
462 5 channels (4.0 + center).
464 6 channels (4.0 + center + LFE).
466 6 channels (4.0 + front/rear center).
468 7 channels (6.0 + LFE).
470 8 channels (4.0 + center + LFE + left and right side).
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482 This is the default mode for hardware channels which lack support for digital
487 All channels will produce sound as usual until a digital format playback is
489 When this happens all other channels will be muted and the latest incoming
499 channels with different format/rate.
500 When a new channel is about to start, the entire list of virtual channels will
509 All playback paths will be converted to this sample rate before the mixing
526 A few differences exist, while memory mapped playback is
541 .Bl -tag -width ".Pa /dev/sndstat" -compact
554 status, including all channels and drivers.
590 .Dl mixer -d pcm1
592 .Bl -diag
634 .%T "Cookbook formulae for audio EQ biquad filter coefficients (Audio-EQ-Cookbook.txt), by Robert Bristow-Johnson"
635 .%U "https://www.musicdsp.org/en/latest/Filters/197-rbj-audio-eq-cookbook.html"
642 .%T "Polynomial Interpolators for High-Quality Resampling of Oversampled Audio, by Olli Niemitalo"
643 .%U "http://yehar.com/blog/wp-content/uploads/2009/08/deip.pdf"
666 .An -nosplit
674 .An Seigo Tanimura Aq Mt tanimura@r.dl.itc.u-tokyo.ac.jp