Yes, thats true. All Pis prior to Pi5/CM5 only have a single I2S port, so you only can connect two microphones.My team and I just bought the RPi Zero 2W and 4 INMP441 MEMS mics. It's capable of I2S interfacing, but apparently, it turns out that we can't directly connect the mics to any open GPIO pins.
Pi5/CM5 has I2S width 4 channels. There you can connect up to 8 of these microphones. Been there, done it.
See
https://learn.adafruit.com/adafruit-i2s ... iring-test
For the first pair use GPIO 20, for the second pair use GPIO 22 instead, for the third GPIO 24, for the forth GPIO 26.
You need to adapt the dts in order to use the extra channels.
Statistics: Posted by fchk — Wed Nov 12, 2025 7:12 am