Pulseaudio Tsched_Buffer_Size | Audio-Digital.net

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Modules – PulseAudio

https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/

tsched_buffer_size Since 4.0. Buffer size in bytes when timer based scheduling is enabled. fixed_latency_range Since 2.0. Boolean. Normally when there's an alsa underrun or overrun, and timer based scheduling is used, the alsa sink or source will raise the minimum latency that applications can get to avoid further underruns or overruns.

PulseAudio Configuration | Linux Sound

https://linuxsound.wordpress.com/2011/03/29/pulseaudio-configuration/

The startup script can be used to pass module specific parameters. This is done by uncommenting the line in the file. For example, passing a new tsched buffer size to the ALSA module would look like this: load-module module-alsa-sink tsched_buffer_size=XYZ. Here are all the module specific parameters for the ALSA module (from module-alsa-card.c) :

pulseaudio: src/modules/alsa/alsa-sink.c File Reference ...

https://fossies.org/dox/pulseaudio-15.0/alsa-sink_8c.html

DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s -- Overall buffer size */ #define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms -- Fill up when only this much is left in the buffer */ #define TSCHED_WATERMARK_INC_STEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms -- On underrun, increase watermark by this */ #define

PulseAudio | Linux Sound

https://linuxsound.wordpress.com/tag/pulseaudio/

udev - For pulseaudio what does tsched do (and what are ...

https://askubuntu.com/questions/371595/for-pulseaudio-what-does-tsched-do-and-what-are-the-defaults

tsched Since 0.9.11. Use system-timer based model (aka glitch-free). Defaults to 1 (enabled). If your hardware does not return accurate timing information (e.g. 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. However I have two machines (different hardware), one which ...

[SOLVED]Pulseaudio default sample rate and Creative ...

https://bbs.archlinux.org/viewtopic.php?id=262755

speaker-test -D sysdefault:CARD=Creative -c 2 -r 192000 -F S32_LE speaker-test 1.2.4 Playback device is sysdefault:CARD=Creative Stream parameters are 192000Hz, S32_LE, 2 channels Using 16 octaves of pink noise Rate set to 192000Hz (requested 192000Hz) Buffer size range from 8192 to 65536 Period size range from 4095 to 4097 Using max buffer size 65536 …

pulseaudio: src/modules/module-udev-detect.c File ...

https://fossies.org/dox/pulseaudio-15.0/module-udev-detect_8c.html

pulseaudio 15.0 About: PulseAudio is a networked sound server (for POSIX OSes), a proxy for your sound applications. Fossies Dox : pulseaudio-15.0.tar.xz ("unofficial" and yet experimental doxygen-generated source code documentation)

71204 – ALSA playback hangs when period size is greater ...

https://bugs.freedesktop.org/show_bug.cgi?id=71204

This in turn depends on the buffer size - larger buffer sizes result in larger values. When the application locks up, it is waiting for poll() inside libasound.so (I don't have debug symbols, sorry). If I add tsched=0 to the PulseAudio config file, the issues are gone.

[SOLVED] Soundcard buffer_size and fragment_size / Kernel ...

https://bbs.archlinux.org/viewtopic.php?id=223446

Right so next step is to calculate how many msecs that is @ s16le 2ch 44100Hz: device.buffering.buffer_size = "35328" => 35328/1411200 = ~25ms. device.buffering.fragment_size = "8832" => 8832/1411200 = ~6ms.

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