ReSpeaker 4-Mic Arrayis a quad-microphone expansion board for Raspberry Pi designed for AI and voice applications. This means you can build a more powerful and flexible voice product that integrates Amazon Alexa Voice Service, Google Assistant, and so on.
Different fromReSpeaker 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. 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 ability to do Voice Activity Detection, estimate Direction of Arrival and show the direction via LED ring, just like Amazon Echo or Google Home.
Raspberry Pi board isn’t included! There are no any audio output interfaces on ReSpeaker 4-Mic Array.It’sonly for voice capture and you can use theheadphone jackon Raspberry Pi for audio output.
Support Raspberry Pi Zero, Zero W, Raspberry Pi 3B / 2B / B+
Dimensions: 65mm x 65mm x 9mm
Weight: G.W 38g
MIC: 4 analog microphones
LED: 12 APA102 programable RGB LEDs, connected to SPI interface
AC108: highly integrated quad-channel ADC with I2S/TDM output transition
Software Algorithm: Voice Activity Detection, DOA and Keyword Search
Voice Capture Distance: 3 meters radius voice capture
1 * ReSpeaker 4-Mic Array for Raspberry Pi