Lines Matching +full:digital +full:- +full:input +full:- +full:threshold +full:- +full:mode +full:- +full:fixed
2 .\" Copyright (c) 2009-2011 Joel Dahl <joel@FreeBSD.org>
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60 driver are: multichannel audio, per-application
74 .Bl -bullet -compact
118 .Xr snd_uaudio 4 (auto-loaded on device plug)
145 .Bl -tag -width ".Va snd_driver_load" -offset indent
167 This will mute the input channel per default.
177 re-routing of channels.
198 Commonly used for ear-candy or frequency compensation due to the vast
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255 .Bl -tag -width indent
261 .Bl -tag -width 2n
262 .It -1
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317 .Bl -tag -width 2n
324 Technically the quality is poor however, due to the lack of anti-aliasing
331 100% fixed point, 64bit accumulator with 32bit coefficients and high precision
342 Sample rate rounding threshold, to avoid large prime division at the
344 All requested sample rates will be rounded to the nearest threshold value.
387 .Bl -tag -width 2n
412 when applications tries to re-open the same device.
425 Enable or disable bitperfect mode.
431 If VCHANs are enabled, the bitperfect mode will use the VCHAN format/rate as
433 The recommended way to use bitperfect mode is to disable VCHANs and enable this
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475 .Bl -tag -width 2n
476 .It fixed
477 Channel mixing is done using fixed format/rate.
478 Advanced operations such as digital passthrough will not work.
481 mode.
482 This is the default mode for hardware channels which lack support for digital
485 Channel mixing is done using fixed format/rate, but advanced operations such
486 as digital passthrough also work.
487 All channels will produce sound as usual until a digital format playback is
490 digital format will be allowed to pass through undisturbed.
491 Multiple concurrent digital streams are supported, but the latest stream will
496 mode, but is a bit smarter, especially for
504 The downside is that the hardware DMA mode needs to be restarted, which may
512 Experimental polling mode support where the driver operates by querying the
541 .Bl -tag -width ".Pa /dev/sndstat" -compact
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"
638 .%T "Julius O'Smith's Digital Audio Resampling"
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