[Gta04-owner] Line each on voice calls with headset....
neilb at suse.de
Fri Sep 14 09:58:42 CEST 2012
I've been experimenting with my headset today and discovered that there is
fairly substantial line-echo.
i.e. I run
arecord | aplay
having set the mixer settings to record from the headset and play back to the
headset. When I talk I hear myself with a short delay, which is exactly
what I expect. However when I stop talking I keep hearing an echo, which
repeats and repeats with only minimal loss of clarity each time.
I've confirmed that it is not an acoustic echo - covering up the headphones
and the microphone make no difference at all - they don't even make it a
little bit quieter.
I tried to play some music out the headphones and record from the headset
mic at the same time and I get the music back quite clearly. I tried the
same without the headphones plugged in, and the recording doesn't pick up
any music. That seems to confirm line-echo in the headset.
I tried 2 different headsets and they both produce the same result.
Is this expected?
When I tried calling my wife she reported a significant echo of everything
she said, presumably due to this line echo. When I use the builtin mic and
earpiece there is no such echo (or much less).
I suspect we might be able to eliminate the echo by tuning the echo
cancelling software, but I really feel that it shouldn't be happening in the
Anyone else get the same result?
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