[Linphone-developers] Improving acoustic echo cancellation on Raspberry Pi using Linphone?

[Mark Eastwood]

Hi,
> 
> I’m using two RPi to communicate as speakerphones using the Linphone SIP 
> clients and despite tuning the echo parameters exhaustively I still get quite 
> a lot of echo for the first several seconds of a call - I’m driving the 
> speaker quite loud and also want maximum microphone sensitivity (Alsamixer 
> levels set around 82 each) which isn’t ideal for reducing echo.  I’m 
> struggling to make further improvements using the .linphonerc file parameters 
> and wondered if anyone has additional suggestions for how I might reduce this 
> initial echo. Are there additional parameters I can play with somewhere?
> 
> Many thanks for any help,
> 
> Mark