[pulseaudio-discuss] echo-cancel module

[Arun Raghavan]

Hey Aaron,

On Fri, 19 Aug 2022, at 5:41 PM, Aaron Brice wrote:
> I'm having trouble getting the echo-cancel module working.  I'm running 
> pulseaudio 15.0 on an i.MX8QM arm embedded system, and trying to do 
> echo-cancel between the speakers and the mic to act as bluetooth 
> speakerphone.  For testing I am playing music through the echo-canceled 
> speaker sink and running parecord on the echo-canceled mic source.  I 
> can do either of those independently and it works.  However, when I 
> start parecord while playing through speakers, pulseaudio goes to 100% 
> CPU and journalctl shows the error "Resume failed, couldn't restore 
> original sample settings." streaming over and over.  Tried with 
> aec_method=null for test purposes and got the same result.

Can't be certain, but this seems like a driver problem.

You could try setting the default and alternate sample rates in /etc/pulse/daemon.conf to 48000 to see if that avoids this sample rate reconfiguration altogether.

Cheers,
Arun