On 29.01.2018 14:44, NicoHood wrote:
On 01/29/2018 01:39 PM, Georg Chini wrote:
On 29.01.2018 12:52, Nico wrote:
Hi,
I want to capture the audio stream of my TV with my PCI-E Toslink sound
card and play it back on my usb XLR soundcard. The reason why I do that
is to use my own music boxes rather than the TV speakers. With toslink +
XLR I do not have problems with ground loops etc.
I am using the pulseaudio loopback module with its default
configuration. The problem is, that the delay between picture and sound
is about one second off, and the longer I wait, the more delay it gets
(30 seconds and more). It is no usable like this.
I tried to play with the latencies of source, sink and the tv delay
itself without sucess. I also tried streaming with pacat directly as
described here:
https://thelinuxexperiment.com/fix-pulseaudio-loopback-delay/
I also tried to change different parameters of the loopback module or
the sources/sinks, but that did not help. I never changed any global
pulseaudio config to avoid larger configuration issues. The CPU usage of
pulseaudio is at 3% with the loopback module
Can anyone help me to get rid of this lag?
Hi Nico,
which version of PA are you using? Can you provide logs?
Regards
Georg
Hi Georg,
oh sure I completely forgot:
pulseaudio 11.1-1 (Arch Linux)
uname -a: Linux zebes 4.14.15-1-ARCH #1 SMP PREEMPT Tue Jan 23 21:49:25
UTC 2018 x86_64 GNU/Linux
Here is a logfile:
LANG=C pulseaudio -vvvv --log-time=1 > ~/pulseverbose.log 2>&1
https://gist.github.com/NicoHood/85976f426e1621e599253ee1a95230dd
Regards
Nico
This is weird. It looks like the source sample rate is so much higher
than the sink rate that module-loopback can't adapt. No idea why
this happens. Does it work with another input?
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