~/.config/pipewire/media-session.d/alsa-monitor. Then append a new rule-block similar to the following one: Using matching rules in pipewire-media-session we can set properties for devices.Ĭopy the default configuration of nf for pipewire-media-session into ~/.config/pipewire/media-session.d. If the "RATE" column of the default sink matches that of the application outputting audio, pipewire is not resampling the signal.Ĭhanging sample rates or formats might help reduce latency with some DACs. TIP: Try to use ALSA output when possible, and avoid unnecessary resampling. Or just use a plugin in your music player (e.g., Qmmp has SoX plugin). It is probably somehow possible to use other resamplers by creating your own sink. Usage: spa-resample -q 15 -f s24 -r 48000 input16bit44100orAnythingElse.wav output24bit48000hz.wav Like with SoX’s sox, Speex’s speexenc, PipeWire includes its standalone version: spa-resample. PipeWire uses its own resampling algorithm called Spa. resample.quality = 15 on 44100→48000 Hz on Ryzen 2600 causes pipewire or pipewire-pulse processes to cause 4.0% one CPU core load. In particular, a set of sufficient conditions is that the rate of convergence of the estimator is known and that the limiting distribution is. The advantage of subsampling is that it is valid under much weaker conditions compared to the bootstrap. And the latency difference between 4, 10, 15 is yet to be investigated by anybody. the resample size is smaller than the sample size and resampling is done without replacement. There is a very little quality difference between 10 and 15, but the CPU load difference is 2-3x. Do not forget to restart PipeWire (without sudo): systemctl -user restart rvice pipewire-pulse.socket (never forget pipewire-pulse.socket if you want your config changes to be applied). If you used PulseAudio with resample-method = speex-float-10 or soxr-vhq, then you might consider uncommenting and changing resample.quality = 4 to 10 or the maximum 15 in stream.properties block in both ~/.config/pipewire/nf and ~/.config/pipewire/nf (copy them from /usr/share/pipewire/ if they do not exist). To check out which input sample rate is used, change pcm0p to pcm0c ( c is short for “capture”, p is for “playback”). To check out which output sample rate and sample format are the data sent to DAC (probably you need to change digits): cat /proc/asound/card0/pcm0p/sub0/hw_params The sample rate follows the sample rate of the audio stream being played when the card is idle. To configure, uncomment and set the line -rates =, for example. PipeWire can also change output sample rates supported by your DAC. For example, if you want 192kHz, uncomment and change value 48000 to = 192000. you own a DAC supporting a higher value) you can do it by editing the line = 48000 in the configuration file ~/.config/pipewire/nf. This article covers configuring audio for optimal playback quality in Arch Linux.īy default PipeWire sets a global sample rate of 48kHz.
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