Bluetooth headsets to the rescue

Paul Fertser fercerpav at
Sat Mar 21 13:13:07 CET 2009

Simon Kagstrom <simon.kagstrom at> writes:
> On Sat, 21 Mar 2009 11:23:40 +0300
> Paul Fertser <fercerpav at> wrote:
>> >   Another (I guess unrelated) problem I have is that the sound
>> > through the headset is quite bad. I hear a faint echo of myself and
>> > the sound has a sharp "metallic" tone to it. My girlfriend in the
>> > other end also complained that the sound was so low that it was
>> > difficult to hear the conversation.
>> Are you sure the echo of yourself is definetely bluetooth-related?
>> Because there're quite some cases in gsm communications where one can
>> hear echo of his voice, i had this myself numerous times using regular
>> dumb cell phone.
> No, I'm not sure. It might not be bluetooth-related, but perhaps is
> caused by the mixer settings. I don't hear my own echo when talking
> without the bluetooth headset though.

Is it statistically-proven?

>> As to the low signal fed to calypso, well, just look at the sound
>> routing diagram and tweak mixer settings, i guess that's an easy one
>> to fix.
> Yes, and maybe the metallic sound is possible to fix with this as well.
> I've tried changing mixer settings in alsamixer somewhat at random
> (basically turning all knobs), 

Hm, you know about routing diagram
with alsa control names, don't you?

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