Bug 75470

Summary:	CoreAudio Device latency configuration
Product:	PulseAudio	Reporter:	Patrik Oldsberg <poldsberg>
Component:	modules	Assignee:	pulseaudio-bugs
Status:	RESOLVED MOVED	QA Contact:	pulseaudio-bugs
Severity:	normal
Priority:	medium	CC:	lennart
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Mac OS X (All)
Whiteboard:
i915 platform:		i915 features:

Description Patrik Oldsberg 2014-02-24 21:35:23 UTC

I have been looking into the high latency when using PulseAudio as input and output on OS X with CoreAudio.
It seems like the default fixed latency of 250ms is used, which ends up being a total latency of 500ms. I tried lowering the latency using PULSE_LATENCY_MSEC but this seems to have no effect. It is however possible to increase the latency using this method.
I noticed that setting the PA_SINK_DYNAMIC_LATENCY and PA_SOURCE_DYNAMIC_LATENCY flags in module-coreaudio-device.c will reduce the latency to about 10ms. Perhaps there should be a way to enable dynamic latency, as this seems to reduce the latency by a significant amount.
Or perhaps there is a reason to not use dynamic latency that I am unaware of?

Comment 1 Tanu Kaskinen 2014-03-07 13:48:47 UTC

Implementing dynamic latency with CoreAudio would be good, but I believe doing it correctly would require more than just setting the DYNAMIC_LATENCY flag.

Comment 2 GitLab Migration User 2018-07-30 10:32:02 UTC

-- GitLab Migration Automatic Message --

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