Freerunner audio channels

David Fokkema dfokkema at
Fri Aug 7 21:27:03 CEST 2009

On Fri, 2009-08-07 at 16:45 +0100, Vasco Névoa wrote:
> I think you're all missing the point.
> David's initial post is a breath of fresh air into a long debated but  
> (AFAIK) non-resolved issue.


> I deeply welcome his investigation into this subject, and support his  
> questions (which I also would like to see answered).
> Although the issue of low playback volume is rather well controlled in  
> our FRs, the issue of low recording volume for GSM transmission  
> remains - with callers still complaining and going "what? I didn't  
> hear you..." now and then, especially in (even slightly) noisy  
> environments.
> The whole "audio settings for GSM" issue is _not_ cut and dried, in my  
> view. I still have to go into frameworkd.conf every time I flash the  
> phone and set the DSP to "long-aec" to avoid echo and sporadic audio  
> clipping, as well as raising the volume in playback and mic in  
> gsmhandset.state... and I'm still not satisfied with audio quality.


> So, can someone please humor David and me and explain this sidetone  
> channel business?

Yes, please!


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