Am Sa 28. Februar 2009 schrieb Matt Hsu: > Hi Angus, > > For the latest hardware version of Neo, aka A7, Om.12.2008 is requisite > to have the following changes > > 1. Apply new alsa state file dynamically according to hardware version. > > http://docs.openmoko.org/trac/attachment/ticket/2121/gsmhandset-a7.state
--- Begin Message ---Am Mo 16. Februar 2009 schrieb Matt Hsu: > > > Please attach gsmhandset.state file so we all can learn how other important > > controls are set up. > > > Hi Joerg and teat team, > > I post the update on the trac. Here is the link: > > https://docs.openmoko.org/trac/ticket/2121 > > MattI checked this gsmhanset.state for microphone path. I confirm it uses correct routing according to http://people.openmoko.org/joerg/ALSA/doc/WM8753_control_diag_gsmhandset_mic_std.png For even further reducing white noise I suggest to modify level adjustments as follows: control.48 0->3 control.12 7->5 control.5 101-> (10..70) [[reduce until you get same sensitivity as before]] reasoning: calypso has a microphone input which is *very* sensitive -> we don't want to drive it with 101/128 of a ~3Vpp output of WM8753 -> set control.5 to low value. WM8753 wants internal level of -6dB for best results, mic2 has output of -48dB (iirc) -> set control.48 mic boost to max. (If WM8753 gets >0dB due to this setting, we will hear distorted sound that feels sharp and aggressive. If this happens, reduce control.48 from 3 to 2, then re-adjust control.5 accordingly) control.12 ST2MOVOL has a range from -15dB..+6dB in 3dB steps, we don't want to change internal level here, so we set to 5 == 0dB Will check earpiece receiver path and level setting later today, as well as possible unwanted sidetone pathes. cheers jOERG
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