Normally when there's an alsa underrun, and timer based scheduling is used, the alsa sink will raise the minimum latency that applications can get to avoid further underruns. Syncronize sw and hw volume changes in IO-threadįixed_latency_range Since 2.0. Since 14.0: If there are multiple controls with the same name, the control index can be added to the name using a comma as the separator. String to prefix to the automatically determined sink name.ĭevice_id tsched_buffer_size, tsched_watermark ignore_dB Creative sound cards) you can try to set tsched=0 to enable the interupt based timing which was used in 0.9.10 and before. If your hardware does not return accurate timing information (e.g. Use system-timer based model (aka glitch-free). The desired fragment size in bytes when opening the device (defaults to 1024) The desired fragments when opening the device.
#AUDIO LOOPBACK PULSEAUDIO DRIVER#
In addition to the general device driver options described above this module supports: device Let module-udev-detect look for the supported cards and then select the profile you want, that will make the right sinks show up. You should (almost) never need to load this module manually. Provides a playback sink for devices supported by the Advanced Linux Sound Architecture (ALSA).
By default the null sink accepts only PCM audio. See supported audio formats for possible values. For example: pcm ac3-iec61937 allows applications to play normal PCM or AC3-encoded audio to the null sink. List of encoding formats, separated by semicolons. In addition to the common sink arguments ( sink_name, sink_properties, format, rate, channels and channel_map), this module supports the following arguments: formats Since 13.0. All sinks have a corresponding "monitor" source which makes the null sink a practical way to plumb output to input. This sink is clocked using the system time. All data written to this sink is silently dropped. The name of the FIFO special file to use.
Provides a simple test source that reads the audio data from a FIFO special file in the file system. Provides a simple test sink that writes the audio data to a FIFO special file in the file system. Update-sink-proplist SINKNAME scription="DESCRIPTION" This is the same as using the update-sink-proplist command after the sink is setup, either with pacmd or in default.pa. Load-module module-alsa-sink sink_name=headphones sink_properties=scription=Headphones For example, you can set the description directly when the module is loaded by setting this parameter. Set additional properties of the sink/source. Since 0.9.16 sink_properties, source_properties The currently defined channel names are: left, right, mono, center, front-left, front-right, front-center, rear-center, rear-left, rear-right, lfe, subwoofer, front-left-of-center, front-right-of-center, side-left, side-right, aux0, aux1 to aux15, top-center, top-front-left, top-front-right, top-front-center, top-rear-left, top-rear-right, top-rear-center, (Default depends on the number of channels and the driver) The sample format, see supported audio formats for possible values (defaults to s16)Ĭhannel map. Allowed characters in the name are a-z, A-Z, numbers, period (.) and underscore (_).
pactl load-module Īll device driver modules support the following parameters: sink_name, source_name Modules may be unloaded using either the module-name or index number. Loading / Unloading via Command Line Interface during runtime To list all modules currently loaded, with their arguments: pactl list modulesįor a short list of loaded modules pactl list modules short
#AUDIO LOOPBACK PULSEAUDIO HOW TO#
For a full list of PulseAudio utilities and how to access their help docs, visit Command Line Interface. These utilities have options which offer additional customization. Modules may loaded manually during runtime through pactl, or they may be pre-loaded via default.pa and loaded at daemon start-up.
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