https://bugs.freedesktop.org/show_bug.cgi?id=75470
Priority: medium
Bug ID: 75470
CC: [email protected]
Assignee: [email protected]
Summary: CoreAudio Device latency configuration
QA Contact: [email protected]
Severity: normal
Classification: Unclassified
OS: Mac OS X (All)
Reporter: [email protected]
Hardware: x86-64 (AMD64)
Status: NEW
Version: unspecified
Component: modules
Product: PulseAudio
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?
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