Getting rid of echo for callers.
Dale Maggee
antisol at internode.on.net
Fri Aug 29 07:13:41 CEST 2008
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
}
}
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