Ive settled on the reSpeaker 2-mic hat as my primary input solution. Below is an image of my ALSA [Capture] settings. This is setup (I believe) for maximum sensitivity, just below levels with serious barge in issues. Im still only able to get the mic to pic up from ~2m. Anyone else use different settings?
I am using the seed studio drivers for now. When I install my next 2-mic hat I may try https://github.com/pguyot/wm8960 for comparison.
The driver really will not make a difference the advantage of the https://github.com/pguyot/wm8960 driver is that it does not lock you to a kernel version which for some is a problem.
If you are going to use the pguyot driver do a amixer contents > contents.txt as you have to do it manually and with the sheer volume of settings it can be extremely hard to work out how to get things going.
This is just optional but a bit of tidy OCD to make the 2mic index 0
sudo nano /etc/modprobe.d/alsa-base.conf
options snd_soc_simple_card index=0
options snd_bcm2835 index=1
options snd slots=snd-soc-simple-card,snd-bcm2835
I just tried that with the seeed drivers and alsamixer and amixer now doesn’t work going to uninstall drivers and use pguyot instead after getting amixer contents.
sudo ./uninstall.sh
If you want contents its here for ref
numid=12,iface=MIXER,name='Headphone Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=11,iface=MIXER,name='Headphone Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
: values=127,127
| dBscale-min=-121.00dB,step=1.00dB,mute=1
numid=17,iface=MIXER,name='PCM Playback -6dB Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=57,iface=MIXER,name='Mono Output Mixer Left Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=58,iface=MIXER,name='Mono Output Mixer Right Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=41,iface=MIXER,name='ADC Data Output Select'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Left Data = Left ADC; Right Data = Right ADC'
; Item #1 'Left Data = Left ADC; Right Data = Left ADC'
; Item #2 'Left Data = Right ADC; Right Data = Right ADC'
; Item #3 'Left Data = Right ADC; Right Data = Left ADC'
: values=0
numid=19,iface=MIXER,name='ADC High Pass Filter Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=36,iface=MIXER,name='ADC PCM Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
: values=195,195
| dBscale-min=-97.50dB,step=0.50dB,mute=1
numid=18,iface=MIXER,name='ADC Polarity'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'No Inversion'
; Item #1 'Left Inverted'
; Item #2 'Right Inverted'
; Item #3 'Stereo Inversion'
: values=0
numid=2,iface=MIXER,name='Capture Volume ZC Switch'
; type=INTEGER,access=rw------,values=2,min=0,max=1,step=0
: values=0,0
numid=3,iface=MIXER,name='Capture Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=1,iface=MIXER,name='Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
: values=39,39
| dBscale-min=-17.25dB,step=0.75dB,mute=0
numid=10,iface=MIXER,name='Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
: values=255,255
| dBscale-min=-127.50dB,step=0.50dB,mute=1
numid=23,iface=MIXER,name='3D Filter Lower Cut-Off'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Low'
; Item #1 'High'
: values=0
numid=22,iface=MIXER,name='3D Filter Upper Cut-Off'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'High'
; Item #1 'Low'
: values=0
numid=25,iface=MIXER,name='3D Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=24,iface=MIXER,name='3D Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=0
numid=33,iface=MIXER,name='ALC Attack'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=2
numid=32,iface=MIXER,name='ALC Decay'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=3
numid=26,iface=MIXER,name='ALC Function'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Off'
; Item #1 'Right'
; Item #2 'Left'
; Item #3 'Stereo'
: values=0
numid=30,iface=MIXER,name='ALC Hold Time'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=0
numid=27,iface=MIXER,name='ALC Max Gain'
; type=INTEGER,access=rw------,values=1,min=0,max=7,step=0
: values=7
numid=29,iface=MIXER,name='ALC Min Gain'
; type=INTEGER,access=rw------,values=1,min=0,max=7,step=0
: values=0
numid=31,iface=MIXER,name='ALC Mode'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'ALC'
; Item #1 'Limiter'
: values=0
numid=28,iface=MIXER,name='ALC Target'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=4
numid=21,iface=MIXER,name='DAC Deemphasis Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=42,iface=MIXER,name='DAC Mono Mix'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Stereo'
; Item #1 'Mono'
: values=0
numid=20,iface=MIXER,name='DAC Polarity'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'No Inversion'
; Item #1 'Left Inverted'
; Item #2 'Right Inverted'
; Item #3 'Stereo Inversion'
: values=0
numid=45,iface=MIXER,name='Left Boost Mixer LINPUT1 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=43,iface=MIXER,name='Left Boost Mixer LINPUT2 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=44,iface=MIXER,name='Left Boost Mixer LINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=9,iface=MIXER,name='Left Input Boost Mixer LINPUT1 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=1
| dBscale-min=0.00dB,step=13.00dB,mute=0
rangemin=2,,rangemax=3
| dBscale-min=20.00dB,step=9.00dB,mute=0
numid=5,iface=MIXER,name='Left Input Boost Mixer LINPUT2 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=4,iface=MIXER,name='Left Input Boost Mixer LINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=49,iface=MIXER,name='Left Input Mixer Boost Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=53,iface=MIXER,name='Left Output Mixer Boost Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=37,iface=MIXER,name='Left Output Mixer Boost Bypass Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=52,iface=MIXER,name='Left Output Mixer LINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=38,iface=MIXER,name='Left Output Mixer LINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=51,iface=MIXER,name='Left Output Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=35,iface=MIXER,name='Noise Gate Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=34,iface=MIXER,name='Noise Gate Threshold'
; type=INTEGER,access=rw------,values=1,min=0,max=31,step=0
: values=0
numid=48,iface=MIXER,name='Right Boost Mixer RINPUT1 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=46,iface=MIXER,name='Right Boost Mixer RINPUT2 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=47,iface=MIXER,name='Right Boost Mixer RINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=8,iface=MIXER,name='Right Input Boost Mixer RINPUT1 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=1
| dBscale-min=0.00dB,step=13.00dB,mute=0
rangemin=2,,rangemax=3
| dBscale-min=20.00dB,step=9.00dB,mute=0
numid=7,iface=MIXER,name='Right Input Boost Mixer RINPUT2 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=6,iface=MIXER,name='Right Input Boost Mixer RINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=50,iface=MIXER,name='Right Input Mixer Boost Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=56,iface=MIXER,name='Right Output Mixer Boost Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=39,iface=MIXER,name='Right Output Mixer Boost Bypass Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=5
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=54,iface=MIXER,name='Right Output Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=55,iface=MIXER,name='Right Output Mixer RINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=40,iface=MIXER,name='Right Output Mixer RINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=2
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=16,iface=MIXER,name='Speaker AC Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=5,step=0
: values=5
numid=15,iface=MIXER,name='Speaker DC Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=5,step=0
: values=4
numid=13,iface=MIXER,name='Speaker Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
: values=127,127
| dBscale-min=-121.00dB,step=1.00dB,mute=1
numid=14,iface=MIXER,name='Speaker Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
Haven’t done that before but my ocd doesn’t work with either driver unless you specify the index alsamixer -c1
But yeah turn on ALC
ALC is off there
Did you actually turn on alc or the noisegate?
It can be easily done from the commandline too with amixer and cset.
I use a little bash script to set my baseline settings on a new install with the 2mics pi hat that work good for me:
#!/bin/bash
amixer -c "seeed2micvoicec" cset numid=1 34,34
amixer -c "seeed2micvoicec" cset numid=26 3
amixer -c "seeed2micvoicec" cset numid=27 4
amixer -c "seeed2micvoicec" cset numid=30 5
amixer -c "seeed2micvoicec" cset numid=32 5
amixer -c "seeed2micvoicec" cset numid=33 5
amixer -c "seeed2micvoicec" cset numid=34 25
amixer -c "seeed2micvoicec" cset numid=35 on
alsactl store
Just save it to the machine/pi with the hat for example as mic_settings.sh and than run it with sudo bash mic_settings.sh from the directory where you saved it. This will turn on both alc and the noise gate and change some of the settings like the max alc gain and capture volume.
You can than tune your alsa mixer settings from that baseline.
You can see all the settings by running:
sudo amixer -c "seeed2micvoicec" contents
Thanks to @rolyan_trauts who helped me figure this out initially.
With pguyot this should set the same
amixer -c "wm8960" cset numid=1 34,34
amixer -c "wm8960" cset numid=26 3
amixer -c "wm8960" cset numid=27 4
amixer -c "wm8960" cset numid=30 5
amixer -c "wm8960" cset numid=32 5
amixer -c "wm8960" cset numid=33 5
amixer -c "wm8960" cset numid=34 25
amixer -c "wm8960" cset numid=35 on
amixer -c "wm8960" cset numid=9 3
amixer -c "wm8960" cset numid=8 3
amixer -c "wm8960" cset numid=49 on
amixer -c "wm8960" cset numid=51 on
amixer -c "wm8960" cset numid=37 0
amixer -c "wm8960" cset numid=38 0
amixer -c "wm8960" cset numid=39 5
amixer -c "wm8960" cset numid=48 on
amixer -c "wm8960" cset numid=50 on
amixer -c "wm8960" cset numid=54 on
amixer -c "wm8960" cset numid=16 5
amixer -c "wm8960" cset numid=15 4
alsactl store
Always bugged me that so much there means so little to me but https://statics.cirrus.com/pubs/proDatasheet/WM8960_v4.4.pdf if I can be bothered one day I might try to work it out 
Also you might want to try the compander with ffmpeg as there is similar in sox but for some reason with sox can use the input but neber figured out how to output anything but a file.
ffmpeg -ac 1 -f alsa -i plughw:2 -filter_complex "compand=attacks=0:points=-30/-900|-20/-20|0/0|20/20" -f alsa plughw:2
https://ffmpeg.org/ffmpeg-filters.html for a whole rake of filters but with the above I output to a loopback sink and then it becomes available as a standard source on the other side of plughw:2
sudo nano /etc/modules-load.d/modules.conf
append snd-aloop to that file input from the wm8960 and output to the loopback and use the loopback as your main card.
Ones of interest
Dunno why my OCD misses the chip mixer name I will maybe sort that one time, doesn’t do the same with usb sound cards.
Also if you are playing locally and swamping the mic with what you are playing.
The speexdsp here Nabaztag as a Rhasspy satellite can be at first confusing but actually works really well to anything else.
@JGKK do you fancy seeing if I got all the wm8960 settings for the pguyot driver and maybe why with that driver we miss the mixer chip name if we reorder the indexes?
Apparently, I have not turned on ALC or the noisegate! Ill give that a try. I did feel like those settings didnt do too much…I guess because they are off. Which lines in the script turn those on?
I read through the spec sheet seems like alot of the “inputs” go un-used in the 2-mic hat case.
However, ALC and noise gate seem like they could be usefull.
In an ideal world, I would have a board that outputs 300khz/32bit audio, down-samples and runs AEC, but seems like ill have to wait on that.
I ran JGKKs script (as im using seed drivers right now). It populated the right output boost bypass and right output mixer: inputR3. Is there a reason for these to be on? I hope not bc ive subsiquently turned them off…
Dunno I posted vanilla seed amixer contents in that post so I will let you scroll through and check
Its 48000Hz max and think all I2s is 24bit.
https://www.hifiberry.com/shop/boards/hifiberry-dac-adc/ think 192Khz might be your max though
prob one of the iqaudio cards does the same.
Mmh shouldn’t touch those. Can you post the content of your sudo amixer -c "seeed2micvoicec" contents command.
For me at least those are not in those ids in the script.
When you run it you should also see the settings it changed.
They are set by default to those values but if you look in the settings they are actually switched off. So I would just let them be.
Unfortunately do to work and no spare 2mic right now I won’t be able to play with it till the weekend
We will let you get the nose to the grind stone apols.
Ps:
Those settings will probably give you problems too. You will need increase the noise gate with that much max alc gain and you will need to increase either the alc hold or the alc attack as otherwise you will get strange artifacts in your audio.
You should really record test audio and listen to it for clipping artifacts or problems due to alc ramping.
Running the mic_settings script again doesnt seem to change those “out settings”, not sure what happened the first time.
Ive done some testing and settled on these settings.
#!/bin/bash
amixer -c “seeed2micvoicec” cset numid=1 34,34
amixer -c “seeed2micvoicec” cset numid=26 3
amixer -c “seeed2micvoicec” cset numid=27 7
amixer -c “seeed2micvoicec” cset numid=29 0
amixer -c “seeed2micvoicec” cset numid=30 5
amixer -c “seeed2micvoicec” cset numid=32 10
amixer -c “seeed2micvoicec” cset numid=33 15
amixer -c “seeed2micvoicec” cset numid=34 30
amixer -c “seeed2micvoicec” cset numid=35 on
alsactl store
Doh I noticed what I did with my OCD index change and copy&paste error and had the snd_usb in there still so the indexes where screwy.
sudo nano /etc/modprobe.d/alsa-base.conf
options snd_soc_simple_card index=0
options snd_bcm2835 index=1
options snd slots=snd-soc-simple-card,snd-bcm2835
I edited above so no one else as dumb as me will do that again, I thought that was weird.
I don’t like the kernel freeze of the seeed2micvoicec driver especially as wm8960 shows that it is pointless so I am running on the https://github.com/pguyot/wm8960 driver but its the same essentially.
The complete current contents are.
numid=12,iface=MIXER,name='Headphone Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=11,iface=MIXER,name='Headphone Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
: values=101,101
| dBscale-min=-121.00dB,step=1.00dB,mute=1
numid=17,iface=MIXER,name='PCM Playback -6dB Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=57,iface=MIXER,name='Mono Output Mixer Left Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=58,iface=MIXER,name='Mono Output Mixer Right Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=41,iface=MIXER,name='ADC Data Output Select'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Left Data = Left ADC; Right Data = Right ADC'
; Item #1 'Left Data = Left ADC; Right Data = Left ADC'
; Item #2 'Left Data = Right ADC; Right Data = Right ADC'
; Item #3 'Left Data = Right ADC; Right Data = Left ADC'
: values=0
numid=19,iface=MIXER,name='ADC High Pass Filter Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=36,iface=MIXER,name='ADC PCM Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
: values=195,195
| dBscale-min=-97.50dB,step=0.50dB,mute=1
numid=18,iface=MIXER,name='ADC Polarity'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'No Inversion'
; Item #1 'Left Inverted'
; Item #2 'Right Inverted'
; Item #3 'Stereo Inversion'
: values=0
numid=2,iface=MIXER,name='Capture Volume ZC Switch'
; type=INTEGER,access=rw------,values=2,min=0,max=1,step=0
: values=0,0
numid=3,iface=MIXER,name='Capture Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=1,iface=MIXER,name='Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
: values=34,34
| dBscale-min=-17.25dB,step=0.75dB,mute=0
numid=10,iface=MIXER,name='Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
: values=215,215
| dBscale-min=-127.50dB,step=0.50dB,mute=1
numid=23,iface=MIXER,name='3D Filter Lower Cut-Off'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Low'
; Item #1 'High'
: values=0
numid=22,iface=MIXER,name='3D Filter Upper Cut-Off'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'High'
; Item #1 'Low'
: values=0
numid=25,iface=MIXER,name='3D Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=24,iface=MIXER,name='3D Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=0
numid=33,iface=MIXER,name='ALC Attack'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=5
numid=32,iface=MIXER,name='ALC Decay'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=5
numid=26,iface=MIXER,name='ALC Function'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Off'
; Item #1 'Right'
; Item #2 'Left'
; Item #3 'Stereo'
: values=3
numid=30,iface=MIXER,name='ALC Hold Time'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=5
numid=27,iface=MIXER,name='ALC Max Gain'
; type=INTEGER,access=rw------,values=1,min=0,max=7,step=0
: values=4
numid=29,iface=MIXER,name='ALC Min Gain'
; type=INTEGER,access=rw------,values=1,min=0,max=7,step=0
: values=0
numid=31,iface=MIXER,name='ALC Mode'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'ALC'
; Item #1 'Limiter'
: values=0
numid=28,iface=MIXER,name='ALC Target'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=4
numid=21,iface=MIXER,name='DAC Deemphasis Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=42,iface=MIXER,name='DAC Mono Mix'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Stereo'
; Item #1 'Mono'
: values=0
numid=20,iface=MIXER,name='DAC Polarity'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'No Inversion'
; Item #1 'Left Inverted'
; Item #2 'Right Inverted'
; Item #3 'Stereo Inversion'
: values=0
numid=45,iface=MIXER,name='Left Boost Mixer LINPUT1 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=43,iface=MIXER,name='Left Boost Mixer LINPUT2 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=44,iface=MIXER,name='Left Boost Mixer LINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=9,iface=MIXER,name='Left Input Boost Mixer LINPUT1 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=1
| dBscale-min=0.00dB,step=13.00dB,mute=0
rangemin=2,,rangemax=3
| dBscale-min=20.00dB,step=9.00dB,mute=0
numid=5,iface=MIXER,name='Left Input Boost Mixer LINPUT2 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=4,iface=MIXER,name='Left Input Boost Mixer LINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=49,iface=MIXER,name='Left Input Mixer Boost Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=53,iface=MIXER,name='Left Output Mixer Boost Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=37,iface=MIXER,name='Left Output Mixer Boost Bypass Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=52,iface=MIXER,name='Left Output Mixer LINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=38,iface=MIXER,name='Left Output Mixer LINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=51,iface=MIXER,name='Left Output Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=35,iface=MIXER,name='Noise Gate Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=34,iface=MIXER,name='Noise Gate Threshold'
; type=INTEGER,access=rw------,values=1,min=0,max=31,step=0
: values=25
numid=48,iface=MIXER,name='Right Boost Mixer RINPUT1 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=46,iface=MIXER,name='Right Boost Mixer RINPUT2 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=47,iface=MIXER,name='Right Boost Mixer RINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=8,iface=MIXER,name='Right Input Boost Mixer RINPUT1 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=1
| dBscale-min=0.00dB,step=13.00dB,mute=0
rangemin=2,,rangemax=3
| dBscale-min=20.00dB,step=9.00dB,mute=0
numid=7,iface=MIXER,name='Right Input Boost Mixer RINPUT2 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=6,iface=MIXER,name='Right Input Boost Mixer RINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=50,iface=MIXER,name='Right Input Mixer Boost Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=56,iface=MIXER,name='Right Output Mixer Boost Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=39,iface=MIXER,name='Right Output Mixer Boost Bypass Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=5
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=54,iface=MIXER,name='Right Output Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=55,iface=MIXER,name='Right Output Mixer RINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=40,iface=MIXER,name='Right Output Mixer RINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=2
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=16,iface=MIXER,name='Speaker AC Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=5,step=0
: values=5
numid=15,iface=MIXER,name='Speaker DC Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=5,step=0
: values=4
numid=13,iface=MIXER,name='Speaker Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
: values=101,101
| dBscale-min=-121.00dB,step=1.00dB,mute=1
numid=14,iface=MIXER,name='Speaker Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
With the above @3m (what Amazon says is the start of far field) sort of normal TV volume aprrox 60db
https://drive.google.com/open?id=1JR5FjA5_bp97qHbcbTpyyOxyJQRrwjhe
with a /etc/asound.conf
pcm.array {
type hw
card wm8960
}
pcm.cap {
type plug
slave {
pcm "array"
channels 2
}
route_policy sum
}
arecord -Dcap -r16000 -fS16_LE -c1 2mic.wav
I noticed from the image attached the volumes where different & ALC so changed.
numid=12,iface=MIXER,name='Headphone Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=11,iface=MIXER,name='Headphone Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
: values=101,101
| dBscale-min=-121.00dB,step=1.00dB,mute=1
numid=17,iface=MIXER,name='PCM Playback -6dB Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=57,iface=MIXER,name='Mono Output Mixer Left Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=58,iface=MIXER,name='Mono Output Mixer Right Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=41,iface=MIXER,name='ADC Data Output Select'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Left Data = Left ADC; Right Data = Right ADC'
; Item #1 'Left Data = Left ADC; Right Data = Left ADC'
; Item #2 'Left Data = Right ADC; Right Data = Right ADC'
; Item #3 'Left Data = Right ADC; Right Data = Left ADC'
: values=0
numid=19,iface=MIXER,name='ADC High Pass Filter Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=36,iface=MIXER,name='ADC PCM Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
: values=195,195
| dBscale-min=-97.50dB,step=0.50dB,mute=1
numid=18,iface=MIXER,name='ADC Polarity'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'No Inversion'
; Item #1 'Left Inverted'
; Item #2 'Right Inverted'
; Item #3 'Stereo Inversion'
: values=0
numid=2,iface=MIXER,name='Capture Volume ZC Switch'
; type=INTEGER,access=rw------,values=2,min=0,max=1,step=0
: values=0,0
numid=3,iface=MIXER,name='Capture Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on
numid=1,iface=MIXER,name='Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
: values=35,35
| dBscale-min=-17.25dB,step=0.75dB,mute=0
numid=10,iface=MIXER,name='Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=255,step=0
: values=215,215
| dBscale-min=-127.50dB,step=0.50dB,mute=1
numid=23,iface=MIXER,name='3D Filter Lower Cut-Off'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Low'
; Item #1 'High'
: values=0
numid=22,iface=MIXER,name='3D Filter Upper Cut-Off'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'High'
; Item #1 'Low'
: values=0
numid=25,iface=MIXER,name='3D Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=24,iface=MIXER,name='3D Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=0
numid=33,iface=MIXER,name='ALC Attack'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=15
numid=32,iface=MIXER,name='ALC Decay'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=10
numid=26,iface=MIXER,name='ALC Function'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Off'
; Item #1 'Right'
; Item #2 'Left'
; Item #3 'Stereo'
: values=3
numid=30,iface=MIXER,name='ALC Hold Time'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=6
numid=27,iface=MIXER,name='ALC Max Gain'
; type=INTEGER,access=rw------,values=1,min=0,max=7,step=0
: values=7
numid=29,iface=MIXER,name='ALC Min Gain'
; type=INTEGER,access=rw------,values=1,min=0,max=7,step=0
: values=0
numid=31,iface=MIXER,name='ALC Mode'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'ALC'
; Item #1 'Limiter'
: values=0
numid=28,iface=MIXER,name='ALC Target'
; type=INTEGER,access=rw------,values=1,min=0,max=15,step=0
: values=12
numid=21,iface=MIXER,name='DAC Deemphasis Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=42,iface=MIXER,name='DAC Mono Mix'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Stereo'
; Item #1 'Mono'
: values=0
numid=20,iface=MIXER,name='DAC Polarity'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'No Inversion'
; Item #1 'Left Inverted'
; Item #2 'Right Inverted'
; Item #3 'Stereo Inversion'
: values=0
numid=45,iface=MIXER,name='Left Boost Mixer LINPUT1 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=43,iface=MIXER,name='Left Boost Mixer LINPUT2 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=44,iface=MIXER,name='Left Boost Mixer LINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=9,iface=MIXER,name='Left Input Boost Mixer LINPUT1 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=1
| dBscale-min=0.00dB,step=13.00dB,mute=0
rangemin=2,,rangemax=3
| dBscale-min=20.00dB,step=9.00dB,mute=0
numid=5,iface=MIXER,name='Left Input Boost Mixer LINPUT2 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=4,iface=MIXER,name='Left Input Boost Mixer LINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=49,iface=MIXER,name='Left Input Mixer Boost Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=53,iface=MIXER,name='Left Output Mixer Boost Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=37,iface=MIXER,name='Left Output Mixer Boost Bypass Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=52,iface=MIXER,name='Left Output Mixer LINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=38,iface=MIXER,name='Left Output Mixer LINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=51,iface=MIXER,name='Left Output Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=35,iface=MIXER,name='Noise Gate Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=34,iface=MIXER,name='Noise Gate Threshold'
; type=INTEGER,access=rw------,values=1,min=0,max=31,step=0
: values=25
numid=48,iface=MIXER,name='Right Boost Mixer RINPUT1 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=46,iface=MIXER,name='Right Boost Mixer RINPUT2 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=47,iface=MIXER,name='Right Boost Mixer RINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=8,iface=MIXER,name='Right Input Boost Mixer RINPUT1 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
: values=3
| dBrange-
rangemin=0,,rangemax=1
| dBscale-min=0.00dB,step=13.00dB,mute=0
rangemin=2,,rangemax=3
| dBscale-min=20.00dB,step=9.00dB,mute=0
numid=7,iface=MIXER,name='Right Input Boost Mixer RINPUT2 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=6,iface=MIXER,name='Right Input Boost Mixer RINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=0
| dBscale-min=-15.00dB,step=3.00dB,mute=1
numid=50,iface=MIXER,name='Right Input Mixer Boost Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=56,iface=MIXER,name='Right Output Mixer Boost Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=39,iface=MIXER,name='Right Output Mixer Boost Bypass Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=5
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=54,iface=MIXER,name='Right Output Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=55,iface=MIXER,name='Right Output Mixer RINPUT3 Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=40,iface=MIXER,name='Right Output Mixer RINPUT3 Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=7,step=0
: values=2
| dBscale-min=-21.00dB,step=3.00dB,mute=0
numid=16,iface=MIXER,name='Speaker AC Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=5,step=0
: values=5
numid=15,iface=MIXER,name='Speaker DC Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=5,step=0
: values=4
numid=13,iface=MIXER,name='Speaker Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
: values=101,101
| dBscale-min=-121.00dB,step=1.00dB,mute=1
numid=14,iface=MIXER,name='Speaker Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
https://drive.google.com/open?id=1kBzhdSJKS4YlaRUbMoy5jiHDdQn4jUD8
I also need help to find the ideal settings. As someone not into audio things i have no idea which setting to change and which not to change and what there meaning is.
Currently i have to shot at my respeaker from 30cm away to get the wake word to trigger - regardless of setting the capture volume to 100%.
I am searching the web for days trying to find out the right settings for the seeed2micvoicecard…
I would like there would be a forum post or wiki or rhasspy doc entry describing how to correct set up the respeaker 2mic hat for ASR.
And which device to use for recording:
Look like it does not matter if i change alsa settings in docker or host, changing one of them changes the other also.
Maybe @romkabouter or @rolyan_trauts can help out with this?
@JGKK set up a script but I think its purely for a host install.
This is the problem with docker and debian as the drivers are specifically written for a raspbian version.
I preferred the https://github.com/pguyot/wm8960 drivers as they where more universal but its been a while and not sure if they have been maintained.
The respeaker 2-mic and any microphone based hat seems to fool the community that a hat is someway an advantage.
Firstly they need drivers as opposed to USB that are already in the kernel, secondly the hat steals your gpio header so other hats such as control are impossible without much diy, thirdly multiple mics are pointless as we have no beamforming algs and fourthly omnidirectional mems mics are actually inferior to the minimal directionality of a plain old electret.
I am going call it a halt to the snakoil that present these as any capable far field mic, so apols nope I am not picking up the topic or going back to them, apols.
Docker on RaspiOSlite
I installed hermesledcontrol which installed dhe driver by itself.
I tried raven to record /play sound and found there is a very loud high noise behind my faint voice. No idea where it comes from, but it explains why the wakeword doesnt work.
Yes was under the impression that 2 mics are better then one and i read 2 are better then the 4mic thing. And i thought there is software included in the driver to use the 2 mics together.
I had it working but after temporarily unplugging the jack i dont got any sound output anymore, after updating OS and rhasspy docker i had a loud sound on all audio out.
After no idea and an dead SD card i installed it again.
Same weird sound. after some time, several restarts and docker restarts with other options the noise disappeared, but the wakeword dont worked very well. I already applied the commands from the script. After some time the wakeword recognising get very bad (do not know after which change) and now i found this loud tone on the recordings.
I found out it’s best to lower the capture volume. I’m working with values lower than 20. Try this.
2 mics without any DSP algs is just 2 mics which due to the speed of sound means distance increases antiphase.
Its that antiphase the DSP algs use for beamforming but without summing actually negates the signal and can cause filter like effects.
If we had any DSP algs then more mics are better but each additional mic takes more processing and think that is why 3 mics seems to be quite common in commercial products.
The distance between mics and number with DSP give the accuracy and max freq that sampling will give.
Your volume and settings want to be how the wake work and ASR models where recorded but likely peaking at 0dB or -3dB as optimum recordings usually are.
To get a modicum of far field those levels are set at near and use AGC to get distance.
Using another raspi with new raspiOS and the 2mic hat i also found the noise on recording with the hat, but not with an usb micro.
It became much better as i set left input boost mixer linput1 to 0 and right too.
I do not know if this is an hardware problem and i do not know if i am supposed to change this setting or what it is for.
Digital Signal Processing its the algs Google & Amazon use that is like sound radar to both judge the direction and distance of a sound source and point that way to get the best signal.
DSP is just a blanket term for software audio effects and processing as AEC Acoustic Echo Cancelation uses whats playing to subtract from the mic to stop feedback.
NS Noise supression from simple filters to RTX voice will remove external noise.
Beamforming uses multiple mics and calculates the difference to beam to direction.
Thank you for explaining. Do you think my micros are broken or has the input boost mixer to be set to 0?