Experiment: better sound on remote end
matthiasfelsche at web.de
Thu Dec 3 11:24:28 CET 2009
Am Mittwoch, den 02.12.2009, 22:04 +0100 schrieb Davide Scaini:
> uhm it seems that dictator uses this scenario
> so...buh... is there a way to let dictator use "standard" scenarios?
Recording is done via this state cause with it Dictator can record
gsm-sound too. You could backup dictator_rec.state and overwrite it.
If not, try arecord.
A new version of dictator will be out soon, I hope this year but I
cannot promise anything cause I'm developing it all alone.
> (just to test this damn alsastate).
> But the question still remains: if i find a nice regulation with
> alsamixer, how do i revert this in the gsmhandset file?
> thanks again
> rms at 1407.org ha scritto:
> > Experiment: better sound on remote end
> > http://blog.1407.org/2009/12/02/experiment-better-sound-on-remote-end/
> > One of the problems people complain about my calls from the Freerunner is *bad*sound*.
> > Lot's of background noise, static, etc. I'm not talking about the familiar buzz problem,
> > as I've had the buzz fix applied to my phone.
> > http://picasaweb.google.com/RuiMSeabra/DebConf9OpenMokoBuzzFixParty#
> > However what I found to fix this problem on
> > my phone model (GTA02v5 + buzz fix) goes totally against the official information.
> > http://wiki.openmoko.org/wiki/Neo_Freerunner_audio_subsystem#Alsamixer_channel_controls
> > So much so that there's at least one person who, from his very good knowledge about this
> > subject (Really! This is *not* sarcasm!), thinks this fix is as good as putting some peanut
> > butter over the microphone :)
> > http://wiki.openmoko.org/index.php?title=Talk:Neo_Freerunner_audio_subsystem&oldid=77886
> > I know of at least one other person who claims to have better sound on remote end from this fix,
> > but I think I need to drop the challenge. Can you try the current SHR Unstable, apply this fix
> > and then report on the mailing lists your results?
> > You can? Good! So here's the fix:
> > 1. call someone who noticed your bad sound and check whether the sound is still bad, then
> > finish the call
> > 2. edit /etc/freesmartphone/alsa/default/gsmhandset
> > 3. change control 63 (it's also on line 63), so that it ends in 3 rather than in 2:
> > * Old value: 63:'Mic Sidetone Mux':1:2
> > * New value: 63:'Mic Sidetone Mux':1:3
> > 4. call that person again and check the result
> > Alternatively, in one call, you can ssh into your phone and use alsamixer to change the same
> > control, but this change will not be persistent until you do the steps above.
> > http://blog.1407.org/wp-content/uploads/2009/12/oldValue.png
> > http://blog.1407.org/wp-content/uploads/2009/12/newValue.png
> > So let's hear your results, nothing like a good empirical experiment.
> > In the following recordings (complete set here),
> > http://files.1407.org/openmoko/mic_sidemux_test/
> > I said «The quick brown fox jumps over the lazy dog» starting with Mic2, then Right PGA, then Left PGA.
> > 1. in perfect conditions;
> > http://files.1407.org/openmoko/mic_sidemux_test/test1-perfect-conditions.wav
> > 2. with tv making background noise (news);
> > http://files.1407.org/openmoko/mic_sidemux_test/test2-with-tv.wav
> > 3. 2. + computer playing loud music («Te Quiero Puta» from Rammstein) at the same time.
> > http://files.1407.org/openmoko/mic_sidemux_test/test3-with-tv-and-music.wav
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