[alsa-devel] TWL4030 low-latency

Clemens Ladisch clemens at ladisch.de
Mon Oct 17 13:23:47 CEST 2011

Ujfalusi, Peter wrote:
> BTW: PA also have 'real time' mode which basically means that it is
> using the kernel scheduling
> for audio timing.

That mode isn't called 'real time' and has nothing to do with real time.
It just uses the kernel timer instead of the sound card clock so that
it can be woken up in irregular intervals.  This mode doesn't work so
well if the sound card doesn't allow to read the current sample position
precisely (many embedded DMA controllers have this problem).


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