[pulseaudio-discuss] My attempt to reduce latency with pacat and tvtime

Pierre-Louis Bossart pierre-louis.bossart at linux.intel.com
Mon May 21 16:15:48 PDT 2012

> 1) TVtime (that's what the original poster uses): doesn't handle audio
> at all (but I was told that there is a fork that does), assumes that
> there is a zero-latency analog wire coming from the TV tuner audio
> output to the sound card's "TV" input. That's why the OP asks about
> module-loopback and/or parec|pacat solution, as a replacement of the
> said wire. Due to the now-invalid assumption about the wire, zero
> latency is needed. Because the audio chain is external to tvtime,
> there is no possibility for any A/V sync queries.

Isn't the simplest solution to add a fixed delay for the video in 
TVtime, and apply the same fixed delay in module-loopback? Any attempts 
to emulate the behavior of an zero-latency analog wire with PulseAudio 
aren't very likely to succeed :-)

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