Really ? i don’t remember reading this anywhere in any documentation - and it is such useful info.
I have tried to use the hw: variant to minimise overhead processing on low-powered satellites, but ended up using plughw: anyway.
after putting this to ~/.asoundrc as described on the linked page:
#This section makes a reference to your I2S hardware, adjust the card name
# to what is shown in arecord -l after card x: before the name in 
#You may have to adjust channel count also but stick with default first
#This is the software volume control, it links to the hardware above and after
# saving the .asoundrc file you can type alsamixer, press F6 to select
# your I2S mic then F4 to set the recording volume and arrow up and down
# to adjust the volume
# After adjusting the volume - go for 50 percent at first, you can do
# something like
# arecord -D dmic_sv -c2 -r 48000 -f S32_LE -t wav -V mono -v myfile.wav
name "Boost Capture Volume"
I can choose from these devices:
but the assumed one - plughw:CARD=sndrpii2scard,DEV=0 - doesn’t work.
How can I use this microphones (in stereo connection) to be used in Rhasspy?