Raspberry Pi Intelligent Voice Module ReSpeaker 4 Microphone 3m Far Field AI Recognition Array Expansion Board

Different from ReSpeaker 2-Mics Pi HAT, this board is developed based on AC108, a highly integrated quad-channel ADC with I2S/TDM output transition for high definition voice capture. Besides, this 4-Mics version provides a super cool LED ring, which contains 12 APA102 programmable LEDs. With that 4 microphones and the LED ring, Raspberry Pi would have the ability to do VAD(Voice Activity Detection), estimate DOA(Direction of Arrival), and show the direction via LED ring, just like Amazon Echo or Google Home.

Technical details
Dimensions:65mm x65mm x9mm
Weight:G.W 38g
Battery:Exclude
MIC:4 analog microphones
LED:12 APA102 programable RGB LEDs, connected to SPI interface
Raspberry Pi 40-Pin Headers:support Raspberry Pi Zero, Raspberry Pi 1 B+, Pi 2 B, Pi 3 B, Pi 3 B+
AC108:highly integrated quad-channel ADC with I2S/TDM output transition
Software Algorithm:VAD(Voice Activity Detection), DOA(Direction of Arrival) and KWS(Keyword Search)
Grove:2 Grove Interfaces
Voice Capture Distance:3 meters radius voice capture

Package Included:
1*Array Expansion Board