GSM buzz and gsmhandset.state
jan.random at googlemail.com
Thu Oct 23 20:35:57 CEST 2008
On Thu, 23 Oct 2008 17:48:51 +0100, Andy Green wrote:
> As I understood what Matt explained today, it seemed there was a danger
> that what these changes did was simply attenuate all the mic audio alike
> along with the buzz.
> It would be highly interesting clue if that was not the case...
If I am not horribly mistaken by all the knobs and dials that I turned,
it is actually possible to have higher mic amplification when mic audio
is routed through PGA than otherwise. Signal to noise ratio (or rather
signal to buzz ratio) is getting way better!
I just made another test call with the original profile (no buzzing this
time, bummer) and then switched to the modified gsmhandset.state and back
repeatedly. The modified profile made a faint buzzing appear - however,
mic audio was louder on the receiving end of the conversation. It was
described to me to be just like the difference between being talked to by
a person facing away from you (original profile) and a person talking to
you face to face (modified profile).
Another point made was that mic amplification seems to be a little high
with my new settings, resulting in a bit of distortion or clipping.
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