The ReSpeaker Core v2.0 looks like it could be fun too:

* Debian-Based Linux System

* SDK for Speech Algorithms with Full Documents

* C++ SDK and Python Wrapper

* Speech Algorithms and Features

* Keyword Spotting (Wake-Up)

* BF (Beamforming)

* DoA (Direction of Arrival)

* NS (Noise Suppression)

* AEC (Acoustic Echo Cancellation) and AGC (Automatic Gain Control)

* All-in-One Solution with High Performance SoC

* 8 Channel ADC for 6 Microphone Array and 2 Loopbacks (Hardware Loopback)

https://respeaker.io/rk3229_core/