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reSpeaker 2-Mics Pi HAT for Raspberry Pi - WM8960 Audio Codec, 2 Analog Microphones, 3 APA102 RGB LEDs, 3.5mm Audio Jack, User Button, attached with NLU software algorithms, VAD,DOA, KWS


ReSpeaker 2-Mics Pi HAT is a dual-microphone expansion board for Raspberry Pi designed for AI and voice applications. You can build a more powerful and flexible voice product that integrates Amazon Alexa Voice Service, Google Assistant, and so on.



The reSpeaker 2-Mics Pi HAT has been equipped with 2 analogue microphones and WM8960 Audio Codec, for high-definition voice capture and process, designed to be the voice user interface for Raspberry Pi Series. Attach with NLU software algorithms, it has the abilities of Voice Activity Detection, Direction of Arrival and Key Word Spotting, widely used in Voice Interaction applications. It is a fine solution for local Neutral Language Understanding.


  • Voice User Interface for Raspberry Pi Series: Placed by 4 analogue microphones, which come with the Voice Interaction algorithms of VAD(Voice Activity Detection), DOA(Direction of Arrival), KWS(Key Word Spotting)
  • WM8960 Audio Codec: Low power, high-quality stereo Codec designed for portable digital audio applications
  • Controllable Peripherals: Provide 3 programable APA102 RGB LEDs and 1 User Button for attached Speech Recognition usage
  • Easy Assembly: Simply pop up on the Raspberry Pi to use


The reSpeaker 2-Mics Pi HAT is the voice user interface for Raspberry Pi Series, which has been equipped 2 analogue microphones and WM8960 Audio Codec for high-definition voice capture. Attach with NLU software algorithms and noise reduction algorithms, it has the abilities of Voice Activity Detection, Direction of Arrival and Key Word Spotting, widely used in Voice Interaction applications.

How does reSpeaker work?

There are analogue microphones mounted on each corner of the square reSpeaker, to receive audio data around then transmit them to the codec. The codec integrates synchronized ADCs with mic boost amplifier, to deliver valid channel data to the Raspberry Pi/ Pi Zero, where it transits them over I2S ports by standard I2S or PCM format, along with a single port by TDM format.

The NLU algorithms will be applied to the Raspberry Pi once the audio data has arrived. The main functions include Voice Activity Detection(VAD), Direction of Arrival(DOA), and Key Word Spotting(WKS), suitable for various Voice Interaction applications such as voice-based remote control cars, voice user interface, keywords wake up and so on.

Since the audio data transmitted may contain the noise as well, the reSpeaker comes with the functions of Auto Echo Cancellation (AEC), Beamforming, Webrtc Noise Suppression (NS), and Automatic Gain Control (AGC) to reduce noise and perform better audio data to the Raspberry Pi.


  • Voice Interaction Learning
  • Secondary software Development
  • Voice-based remote control cars

Get started with Google Assistant

How to use button to trigger Google Assistant





2 analog microphones



Raspberry Pi 40-Pin Headers

Support Raspberry Pi Zero, Raspberry Pi 1B+/2B/3B/3B+/4B

WM8960 codec

Low power, high quality stereo Codec designed for portable digital audio applications

Software Algorithm

VAD(Voice Activity Detection), DOA(Direction of Arrival) and KWS(Keyword Search)

User button

1 programmable button

Voice Capture Distance

3 meters radius voice capture




65mm x 30mm x 15mm


G.W 33g

Part List

reSpeaker 4-Mic Array for Raspberry Pi x1

Technical details

Dimensions 65mm x30mm x15mm
Weight G.W 33g
Battery Exclude

Part List

ReSpeaker 2-Mics Pi HAT 1


HSCODE 8518900090
USHSCODE 8517180050
UPC 841454120018
EUHSCODE 8517180000
EU DoC 1
RoHS 1
UK DoC 1



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  1. Product Quality
    from order view
    Product in good condition, functions as expected!
  2. Product Quality
    Works well
    Using to add microphone + headphones to Pi Zero. Works well. Couple annoyances... First, the HAT comes with a 2x20 header jack presoldered, so cannot be installed on bottom on Pi Zero, thus is not useable with Pi Zero official case. Second, the speaker connector is not common -- would be nice to see screw terminal blocks, into which any speaker wires can be inserted. Third, would love to see a .deb file which distributes drivers, rather than the script which takes ~10 minutes to compile + install.
  3. Product Quality
    Perfect for a voice assistant !
    That card is just perfect to use on Raspberry PI 3+ ou 0 W fos building your own non intrusive voice assistant based on SNIPS !
    Have these cards on around 10 raspberry in my house setup with SNIPS and interacting with my Home assistant system and it works really great.
    Stable, good voice recognition without any complicated setup on card.
    Allows you easily to plug either wired speaker on jack or headset or external speaker.
    Perfect product for cheap, efficient and fully private voice assistant home made.
  4. Product Quality
  5. Product Quality
    I'm using this product to add microphones to Pi Zeros and Pis - quality is great for the price - highly recommended. I had one problem - a consistent pulsing noise: it turned out to be interference from the power supply/USB cable.


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