Daniel Selinger wrote: > I've experimented with alsa settings for the last 3 hours and want to > share my experience now. > I was doing this on top of QTopia 4.3.2 and it's default > gsmhandset.state file. > > The relevant mixer settings i found to, in my case completely eliminate > the echo for the caller, are the following > (Setting -> Old Val -> New Val): > > 'Speaker Playback Volume' 127 -> 100 > 'Mono Playback Volume' 103 -> 85 > 'Mono Sidetone Playback Volume' 2 -> 0 > 'Bypass Playback Volume' 7 -> 5 > 'Mic2 Capture Volume' 0 -> 3 > > This settings removes the echo for the other person completely, at > least for my hardware. I didn't hear any buzz either on my final > testcalls, could be luck. > > The last thing remaining, is a bit of selfecho, which was also > reduced with this settings but not away. (was as loud as the echo on the > other phone with qtopia default gsmhandset.state). But didn't get away > completely, but the other side doesn't hear anything of it. > > I also attach my gsmhandset.state for the case other distros have a > different default file. (I was to lazy to check against .state of every > distribution) > > If anyone has a configuration where he doesn't hear echo of himself > talking at all, please please please provide me with an .state file, to > check which controls are responsible for that! > > rgds Daniel > ------------------------------------------------------------------------ > > These settings also removed my echo using 2007.2.
woot! Note that using the settings you provided the other (non-neo) person was very quiet, I had to adjust one of the volume settings to be able to hear the other person (unfortunately I can't remember exactly which setting I changed, although I'm pretty sure it was the one labelled "mono bypass" in alsamixer. (set it at 100). Called my brother who had previously complained loudly and constantly about echo, and now he says there's no echo. I have never had problems of hearing an echo of myself, only complaints from everybody I talk to... this is awesome, thanks alot! :) -Dale my gsmhandset.state: state.neo1973gta02 { control.1 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 255' iface MIXER name 'PCM Volume' value.0 0 value.1 0 } control.2 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 255' iface MIXER name 'ADC Capture Volume' value.0 0 value.1 0 } control.3 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 127' iface MIXER name 'Headphone Playback Volume' value.0 0 value.1 0 } control.4 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 127' iface MIXER name 'Speaker Playback Volume' value.0 127 value.1 127 } control.5 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 127' iface MIXER name 'Mono Playback Volume' value 85 } control.6 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 7' iface MIXER name 'Bypass Playback Volume' value.0 5 value.1 5 } control.7 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 7' iface MIXER name 'Sidetone Playback Volume' value.0 0 value.1 0 } control.8 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 7' iface MIXER name 'Voice Playback Volume' value.0 0 value.1 0 } control.9 { comment.access 'read write' comment.type BOOLEAN comment.count 2 iface MIXER name 'Headphone Playback ZC Switch' value.0 false value.1 false } control.10 { comment.access 'read write' comment.type BOOLEAN comment.count 2 iface MIXER name 'Speaker Playback ZC Switch' value.0 false value.1 false } control.11 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 7' iface MIXER name 'Mono Bypass Playback Volume' value 7 } control.12 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 7' iface MIXER name 'Mono Sidetone Playback Volume' value 0 } control.13 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 7' iface MIXER name 'Mono Voice Playback Volume' value 0 } control.14 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Mono Playback ZC Switch' value false } control.15 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Linear Control' comment.item.1 'Adaptive Boost' iface MIXER name 'Bass Boost' value 'Linear Control' } control.16 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 '130Hz @ 48kHz' comment.item.1 '200Hz @ 48kHz' comment.item.2 '100Hz @ 16kHz' comment.item.3 '400Hz @ 48kHz' comment.item.4 '100Hz @ 8kHz' comment.item.5 '200Hz @ 8kHz' iface MIXER name 'Bass Filter' value '130Hz @ 48kHz' } control.17 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 15' iface MIXER name 'Bass Volume' value 0 } control.18 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 15' iface MIXER name 'Treble Volume' value 0 } control.19 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 '8kHz' comment.item.1 '4kHz' iface MIXER name 'Treble Cut-off' value '8kHz' } control.20 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 7' iface MIXER name 'Sidetone Capture Volume' value.0 0 value.1 0 } control.21 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 7' iface MIXER name 'Voice Sidetone Capture Volume' value 2 } control.22 { comment.access 'read write' comment.type INTEGER comment.count 2 comment.range '0 - 63' iface MIXER name 'Capture Volume' value.0 0 value.1 0 } control.23 { comment.access 'read write' comment.type BOOLEAN comment.count 2 iface MIXER name 'Capture ZC Switch' value.0 false value.1 false } control.24 { comment.access 'read write' comment.type BOOLEAN comment.count 2 iface MIXER name 'Capture Switch' value.0 true value.1 true } control.25 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 '3.4Hz @ 48kHz' comment.item.1 '82Hz @ 16k' comment.item.2 '82Hz @ 8kHz' comment.item.3 '170Hz @ 8kHz' iface MIXER name 'Capture Filter Select' value '3.4Hz @ 48kHz' } control.26 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 HiFi comment.item.1 Voice iface MIXER name 'Capture Filter Cut-off' value HiFi } control.27 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Capture Filter Switch' value false } control.28 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 7' iface MIXER name 'ALC Capture Target Volume' value 0 } control.29 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 7' iface MIXER name 'ALC Capture Max Volume' value 0 } control.30 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 Off comment.item.1 Right comment.item.2 Left comment.item.3 Stereo iface MIXER name 'ALC Capture Function' value Off } control.31 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'ALC Capture ZC Switch' value false } control.32 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 15' iface MIXER name 'ALC Capture Hold Time' value 0 } control.33 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 15' iface MIXER name 'ALC Capture Decay Time' value 0 } control.34 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 15' iface MIXER name 'ALC Capture Attack Time' value 0 } control.35 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 31' iface MIXER name 'ALC Capture NG Threshold' value 0 } control.36 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Constant PGA Gain' comment.item.1 'Mute ADC Output' iface MIXER name 'ALC Capture NG Type' value 'Mute ADC Output' } control.37 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'ALC Capture NG Switch' value false } control.38 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 Capture comment.item.1 Playback iface MIXER name '3D Function' value Capture } control.39 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 '2.2kHz' comment.item.1 '1.5kHz' iface MIXER name '3D Upper Cut-off' value '2.2kHz' } control.40 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 '200Hz' comment.item.1 '500Hz' iface MIXER name '3D Lower Cut-off' value '200Hz' } control.41 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 15' iface MIXER name '3D Volume' value 0 } control.42 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name '3D Switch' value false } control.43 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Capture 6dB Attenuate' value false } control.44 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Playback 6dB Attenuate' value false } control.45 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 None comment.item.1 '32kHz' comment.item.2 '44.1kHz' comment.item.3 '48kHz' iface MIXER name De-emphasis value None } control.46 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 Stereo comment.item.1 Left comment.item.2 Right comment.item.3 Mono iface MIXER name 'Playback Mono Mix' value Stereo } control.47 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Non Inverted' comment.item.1 Inverted iface MIXER name 'Playback Phase' value 'Non Inverted' } control.48 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 3' iface MIXER name 'Mic2 Capture Volume' value 3 } control.49 { comment.access 'read write' comment.type INTEGER comment.count 1 comment.range '0 - 3' iface MIXER name 'Mic1 Capture Volume' value 0 } control.50 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'DAI 0' comment.item.1 'DAI 1' comment.item.2 'DAI 2' comment.item.3 'DAI 3' iface MIXER name 'DAI Mode' value 'DAI 0' } control.51 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 Stereo comment.item.1 'Left ADC' comment.item.2 'Right ADC' comment.item.3 'Channel Swap' iface MIXER name 'ADC Data Select' value Stereo } control.52 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Non Inverted' comment.item.1 Inverted iface MIXER name 'ROUT2 Phase' value Inverted } control.53 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Mic 1' comment.item.1 'Mic 2' comment.item.2 'Mic 3' iface MIXER name 'Mic Selection Mux' value 'Mic 1' } control.54 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'RXP - RXN' comment.item.1 'RXP + RXN' comment.item.2 RXP comment.item.3 RXN iface MIXER name 'Rx Mixer' value 'RXP - RXN' } control.55 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Line 1 + 2' comment.item.1 'Line 1 - 2' comment.item.2 'Line 1' comment.item.3 'Line 2' iface MIXER name 'Line Mixer' value 'Line 1 + 2' } control.56 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Line Mix' comment.item.1 'Rx Mix' iface MIXER name 'Line Mono Mux' value 'Line Mix' } control.57 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Line 2' comment.item.1 'Rx Mix' iface MIXER name 'Line Right Mux' value 'Rx Mix' } control.58 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Line 1' comment.item.1 'Rx Mix' iface MIXER name 'Line Left Mux' value 'Rx Mix' } control.59 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'ALC Mixer Line Capture Switch' value false } control.60 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'ALC Mixer Mic2 Capture Switch' value true } control.61 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'ALC Mixer Mic1 Capture Switch' value false } control.62 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'ALC Mixer Rx Capture Switch' value false } control.63 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Left PGA' comment.item.1 'Mic 1' comment.item.2 'Mic 2' comment.item.3 'Right PGA' iface MIXER name 'Mic Sidetone Mux' value 'Mic 2' } control.64 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 PGA comment.item.1 'Line or RXP-RXN' comment.item.2 Sidetone iface MIXER name 'Capture Right Mux' value PGA } control.65 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 PGA comment.item.1 'Line or RXP-RXN' comment.item.2 Line iface MIXER name 'Capture Left Mux' value PGA } control.66 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 Stereo comment.item.1 'Analogue Mix Left' comment.item.2 'Analogue Mix Right' comment.item.3 'Digital Mono Mix' iface MIXER name 'Capture Right Mixer' value Stereo } control.67 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 Stereo comment.item.1 'Analogue Mix Left' comment.item.2 'Analogue Mix Right' comment.item.3 'Digital Mono Mix' iface MIXER name 'Capture Left Mixer' value Stereo } control.68 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Playback Mixer Voice Capture Sw' value false } control.69 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Playback Mixer Left Capture Swi' value false } control.70 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Playback Mixer Right Capture Sw' value false } control.71 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 VREF comment.item.1 'Capture ST' comment.item.2 LOUT2 iface MIXER name 'Out4 Mux' value VREF } control.72 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 VREF comment.item.1 ROUT2 comment.item.2 'Left + Right' iface MIXER name 'Out3 Mux' value VREF } control.73 { comment.access 'read write' comment.type ENUMERATED comment.count 1 comment.item.0 'Inverted Mono 1' comment.item.1 Left comment.item.2 Right comment.item.3 'Left + Right' iface MIXER name 'Mono 2 Mux' value 'Inverted Mono 1' } control.74 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Mono Mixer Left Playback Switch' value false } control.75 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Mono Mixer Right Playback Switc' value false } control.76 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Mono Mixer Voice Playback Switc' value false } control.77 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Mono Mixer Sidetone Playback Sw' value true } control.78 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Mono Mixer Bypass Playback Swit' value false } control.79 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Right Mixer Voice Playback Swit' value false } control.80 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Right Mixer Sidetone Playback S' value false } control.81 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Right Mixer Right Playback Swit' value false } control.82 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Right Mixer Bypass Playback Swi' value true } control.83 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Left Mixer Voice Playback Switc' value false } control.84 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Left Mixer Sidetone Playback Sw' value false } control.85 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Left Mixer Left Playback Switch' value false } control.86 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Left Mixer Bypass Playback Swit' value true } control.87 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'DAPM Stereo Out Switch' value false } control.88 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'DAPM GSM Line Out Switch' value true } control.89 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'DAPM GSM Line In Switch' value true } control.90 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'DAPM Headset Mic Switch' value true } control.91 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'DAPM Handset Mic Switch' value true } control.92 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'DAPM Handset Spk Switch' value true } control.93 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Amp State Switch' value false } control.94 { comment.access 'read write' comment.type BOOLEAN comment.count 1 iface MIXER name 'Amp Spk Switch' value false } } _______________________________________________ Openmoko community mailing list 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