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<th>Priority</th>
<td>medium
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - CoreAudio Device latency configuration"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75470">75470</a>
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<th>CC</th>
<td>lennart@poettering.net
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<th>Assignee</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>Summary</th>
<td>CoreAudio Device latency configuration
</td>
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<th>QA Contact</th>
<td>pulseaudio-bugs@lists.freedesktop.org
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>Mac OS X (All)
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<th>Reporter</th>
<td>poldsberg@gmail.com
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Component</th>
<td>modules
</td>
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<th>Product</th>
<td>PulseAudio
</td>
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<pre>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?</pre>
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