Hi. I want to use other I2C devices together with a 6-mic / 4-mic hat. The replication connector I2C for that is perfect on the Voice Accessory Hat board 
However I don’t know whether the I2C bus is already used by the board and if yes which adresses ?
Thanks in advance
Hi @thmacoem, The 6-mic hat and 4-mic have the Grove I2C port and it’s connected to the raspberry pi I2C-1. and you can use the rpI2C to scan the connected i2c device address.
You need to use Grove.py it’s a python library for seeedstudio grove devices on embedded Linux platform. you can find more details here at https://wiki.seeedstudio.com/Grove_Base_Hat_for_Raspberry_Pi/#archtecture
ReSpeaker 4-Mic Array for Raspberry Pi
ReSpeaker 6-Mic Circular Array kit for Raspberry Pi
src: