how to configure I2S microphone on RPi ZW

[MakeSenseIoT]

Hi,
I'm trying to do the audio streaming on RPi ZW as per example here https://www.linux-projects.org/uv4l/tutorials/rpi-webapp-screen-audio-keyboard-sharing/ .The I2S microphone works following the setup from here https://github.com/mano1979/Pesky-Products-ICS-43434
When I try your software, I have:
root@raspberrypi:# cava
Could not open pulseaudio mainloop to find default device name: 0
check if pulseaudio is running
root@raspberrypi:#
root@raspberrypi:# arecord -l | grep CARD
root@raspberrypi:# arecord -L | grep CARD
sysdefault:CARD=Loopback
front:CARD=Loopback,DEV=0
surround21:CARD=Loopback,DEV=0
surround40:CARD=Loopback,DEV=0
surround41:CARD=Loopback,DEV=0
surround50:CARD=Loopback,DEV=0
surround51:CARD=Loopback,DEV=0
surround71:CARD=Loopback,DEV=0
dmix:CARD=Loopback,DEV=0
dmix:CARD=Loopback,DEV=1
dsnoop:CARD=Loopback,DEV=0
dsnoop:CARD=Loopback,DEV=1
hw:CARD=Loopback,DEV=0
hw:CARD=Loopback,DEV=1
plughw:CARD=Loopback,DEV=0
plughw:CARD=Loopback,DEV=1
sysdefault:CARD=memsmic
dmix:CARD=memsmic,DEV=0
dsnoop:CARD=memsmic,DEV=0
hw:CARD=memsmic,DEV=0
plughw:CARD=memsmic,DEV=0
root@raspberrypi:~#

root@raspberrypi:# arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
Subdevices: 8/8
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
Subdevice #7: subdevice #7
card 1: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
Subdevices: 8/8
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
Subdevice #7: subdevice #7
card 2: memsmic [mems-mic], device 0: bcm2835-i2s-ics43432-hifi ics43432-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
root@raspberrypi:#
Can you kindly help with a setup?
Cheers,
Jan

[karlstav]

you have setup cava to use pulseaudio, but you don't seem to have pulseaudio installed. change your config to use alsa instead.

[MakeSenseIoT]

I have now:
root@RPi3AP:~/.config/cava# arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: memsmic [mems-mic], device 0: bcm2835-i2s-ics43432-hifi ics43432-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

root@RPi3AP:/.config/cava# arecord -L | grep CARD
default:CARD=memsmic
sysdefault:CARD=memsmic
dmix:CARD=memsmic,DEV=0
dsnoop:CARD=memsmic,DEV=0
hw:CARD=memsmic,DEV=0
plughw:CARD=memsmic,DEV=0
root@RPi3AP:/.config/cava#

within config I put:

method = alsa
source = hw:1
; source = hw:Loopback,1

but I have a black screen.

Can you help? Sorry, I'm a newbie to Linux

[MakeSenseIoT]

I have it working, but only with a single channel (mono)
It seems to be a problem with i2s-mmap. I added dtoverlay=i2s-mmap in my /boot/config.txt and I use the following .asoundrc

pcm.mic_hw{
type hw
card memsmic
channels 2
format S32_LE
}
pcm.mic_mm{
type mmap_emul
slave.pcm mic_hw
}
pcm.mic_rt{
type route
slave.pcm mic_mm
ttable.0.0 1
ttable.0.1 0
ttable.1.0 1
ttable.1.1 0
}
pcm.mic_sv{
type softvol
slave.pcm mic_rt
control {
name "Boost Capture Volume"
card memsmic
}
min_dB -3.0
max_dB 50.0
}

Any idea how to fix it?

[karlstav]

something with the ttable probably, don't know. could be something with the mic...