[pulseaudio-discuss] Loopback Delays
tanu.kaskinen at linux.intel.com
Mon Mar 3 09:03:02 PST 2014
On Mon, 2014-03-03 at 08:30 -0800, James Board wrote:
> > I use my Linux PC to play audio from
> > my DVR to my PC speakers. So, the DVR audio output is
> > connected to the audio input of the PC. The audio
> > output of the PC is connected to the PC speakers. In
> > pulseaudio, I load the loopback module (I don't remember the
> > exact terminology) to route the audio from PC input to PC
> > output. It's fairly simple.
> > The problem is that this introduces a 0.5 second delay in
> > the audio. The sounds being played through the PC
> > speakers occur 0.5 seconds after the video. Very
> > noticeable. How can I eliminate, or reduce this
> > delay?
> There were no responses to my question. Did I explain
> poorly? Or maybe this was a dumb question? Or,
> is it not possible to reduce this delay?
No, it's not a dumb question, it's just that people don't always have
time to answer all questions (or they may answer the questions after
You can try to play with the "latency_msec" argument of module-loopback.
If that doesn't work, then you have to introduce delay in the video
output. If that's not possible, then you're out of luck.
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