Contents
When to use null sink in PulseAudio module?
The default policy in PulseAudio is to only allow exclusive access if nothing else is currently using the sink. With this module, all the existing streams are muted (by being re-routed to the null sink) when a passthrough stream comes in, allowing the passthrough stream to exclusively use the sink.
How to redirect PulseAudio sink to virtual source?
Create a sink which takes application audio and sends it to our speakers and the special mixing sink we just created (replace alsa_output….analog-stereo with your sink’s name, see pactl list sinks short .) Loopback our actual microphone to our mixing sink (replace alsa_input…analog-stereo with your source’s name, see pactl list sources short .)
How does module-udev-detect work in PulseAudio?
Let module-udev-detect look for the supported cards and then select the profile you want, that will make the right sinks show up. In addition to the general device driver options described above this module supports: The ALSA device to use. (defaults to “default”) The desired fragments when opening the device. (defaults to 12)
How is PulseAudio used in multiple audio sources?
PulseAudio allows for simultaneous output to multiple sources. In this example, some applications are configured to use HDMI while others are configured to use analog. Multiple applications are able to receive audio at the same time. (aplay is from the alsa-utils package.)
How many characters are allowed in a name in PulseAudio?
Allowed characters in the name are a-z, A-Z, numbers, period (.) and underscore (_). The length must be 1-128 characters. The sample format, see supported audio formats for possible values (defaults to s16 ) The sample rate (defaults to 44100) Audio channels (defaults to 2) Channel map. A list of comma-separated channel names.
Which is ALSA card does PulseAudio use?
The “device_id” argument is mandatory, it tells PulseAudio which ALSA card to use. Name for the PulseAudio card. Extra properties to be stored in the card’s property list. Name to be used by the card’s sinks.
What does Boolean do when there is an ALSA underrun?
Boolean. 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. If this option is enabled, the minimum latency will stay constant even if underruns occur.
Where do I find playback sink in Linux?
Provides a playback sink for devices supported by the Advanced Linux Sound Architecture (ALSA). The sink name defaults to alsa_output. You should (almost) never need to load this module manually. Let module-udev-detect look for the supported cards and then select the profile you want, that will make the right sinks show up.
Can you run PulseAudio as a system wide daemon?
Running PulseAudio as System-Wide Daemon. Starting with PulseAudio 0.9.3 the daemon can be run as a system-wide instance which than can be shared by multiple local users. We recommend running the PulseAudio daemon per-user, just like the traditional ESD sound daemon.
What does sample cache do in PulseAudio server?
Sample cache PulseAudio implements an in-memory storage for short named batches of samples that may be uploaded to the server once and then played multiple times. Stream management PulseAudio manages all input and output streams of all desktop applications, providing them such features as clocking, buffering, and rewinding. Time management
How does PulseAudio automatically set parameters for devices?
Automatic setup and routing PulseAudio automatically sets parameters of cards, devices, and streams, routes streams to devices, and performs other housekeeping actions.