Lines Matching +full:hw +full:- +full:channels

2 .\" Copyright (c) 2009-2011 Joel Dahl <joel@FreeBSD.org>
39 .Bd -ragged -offset indent
60 driver are: multichannel audio, per-application
61 volume control, dynamic mixing through virtual sound channels, true full
74 .Bl -bullet -compact
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
232 .Bl -tag -width indent
251 .Va hw.snd.*
255 .Bl -tag -width indent
256 .It Va hw.snd.compat_linux_mmap
261 .Bl -tag -width 2n
262 .It -1
273 .It Va hw.snd.default_auto
276 .Bl -tag -width 2n
285 .It Va hw.snd.default_unit
294 .Pa /dev/dsp Ns Va ${hw.snd.default_unit} .
295 .It Va hw.snd.feeder_eq_exact_rate
301 .It Va hw.snd.feeder_rate_max
303 .It Va hw.snd.feeder_rate_min
305 .It Va hw.snd.feeder_rate_polyphase_max
313 .It Va hw.snd.feeder_rate_quality
317 .Bl -tag -width 2n
324 Technically the quality is poor however, due to the lack of anti-aliasing
341 .It Va hw.snd.feeder_rate_round
347 .It Va hw.snd.latency
352 .Va hw.snd.latency_profile
355 .It Va hw.snd.latency_profile
357 .Va hw.snd.latency
363 .It Va hw.snd.maxautovchans
371 .It Va hw.snd.report_soft_formats
376 .It Va hw.snd.report_soft_matrix
380 .It Va hw.snd.verbose
387 .Bl -tag -width 2n
391 The number of playback, record, virtual channels, and
402 .It Va hw.snd.vpc_0db
408 .It Va hw.snd.vpc_autoreset
412 when applications tries to re-open the same device.
413 .It Va hw.snd.vpc_mixer_bypass
422 .It Va hw.snd.vpc_reset
426 When enabled, channels will skip all dsp processing, such as channel
446 By default only 2 channels are enabled.
448 .Bl -tag -width 2n
452 Stereo, 2 channels (left, right).
454 3 channels (left, right, LFE).
456 3 channels (left, right, rear center).
458 Quadraphonic, 4 channels (front/rear left and right).
460 5 channels (4.0 + LFE).
462 5 channels (4.0 + center).
464 6 channels (4.0 + center + LFE).
466 6 channels (4.0 + front/rear center).
468 7 channels (6.0 + LFE).
470 8 channels (4.0 + center + LFE + left and right side).
475 .Bl -tag -width 2n
482 This is the default mode for hardware channels which lack support for digital
487 All channels will produce sound as usual until a digital format playback is
489 When this happens all other channels will be muted and the latest incoming
499 channels with different format/rate.
500 When a new channel is about to start, the entire list of virtual channels will
541 .Bl -tag -width ".Pa /dev/sndstat" -compact
547 .Pa /dev/dsp${hw.snd.default_unit} .
549 .Pa hw.snd.basename_clone
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