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[Linphone-developers] Improving acoustic echo cancellation on Raspberry

From: Mark Eastwood
Subject: [Linphone-developers] Improving acoustic echo cancellation on Raspberry Pi using Linphone?
Date: Thu, 2 Jul 2015 21:13:02 +0100

> 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

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