I made the switch to SHR to test out how things are. The echo problem is resolved with the following patch
http://lists.openmoko.org/nabble.html#nabble-td1486414|a1518726 Now there was the annoying buzz to rectify. This worked perfectly for me. http://www.mail-archive.com/support@lists.openmoko.org/msg00564.html On Mon, Dec 15, 2008 at 12:21 PM, Al Johnson <openm...@mazikeen.demon.co.uk> wrote: > On Monday 15 December 2008, Paul wrote: >> > It's possible, but the buzz is within the voice frequency range. If we >> > could characterise the buzz sufficiently it may be possible to remove it >> > by applying a suitable digital filter in the CPU, but a hardware fix is >> > certainly preferable. >> >> I was thinking a software noise gate would be preferable since it >> requires less computing. Also, anyone tried sound proofing the mic >> with sound insulating foam to prevent the sound from traveling through >> the phone? > > There's a noise gate in the Wolfson chip, but I never managed to get it > working. The functions in the GSM chipset sound like a noise gate in > operation too. A better low-computing method might be to monitor the GSM > output and mute the mic if there is significant signal there. This approach > is used by some VoIP handsets ad is very effective at preventing echo, but > can be awkward as the other end can't hear when you interrupt them ;-) > > The mic has rubber around it which seals the gap between the mic and the case. > I haven't tried modifying this. > > _______________________________________________ > support mailing list > support@lists.openmoko.org > https://lists.openmoko.org/mailman/listinfo/support > -- Paul Email - pault...@gmail.com There were moments when he looked on evil simply as a mode through which he could realize his conception of the beautiful. Oscar Wilde - The Picture of Dorian Gray _______________________________________________ support mailing list support@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/support