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reSpeaker 4-Mic Array for Raspberry Pi - AC108 Audio Codec, 4 Analog Microphones, 12 Programable RGB LEDs, 2 Grove ports, attached with NLU software algorithms, VAD,DOA, KWS

SKU
103030216

The reSpeaker 4-Mic Array has been equipped with 4 analog microphones and AC108 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.

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PRODUCT DETAILS

The reSpeaker 4-Mic Array has been equipped with 4 analog microphones and AC108 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 DetectionDirection of Arrival and Key Word Spotting, widely used in Voice Interaction applications. It is a fine solution for local Neutral Language understanding.

Feature

  • 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)
  • AC108 Audio Codec: Integrated quad-channel ADC with I2S/TDM to output transition for high-definition voice capture
  • Controllable Peripherals: Provide 12 programable RGB LEDs and 2 Grove ports for attached Speech Recognition usage
  • Easy Assembly: Simply pop up on the Raspberry Pi to use

Description

The reSpeaker 4-Mic Array is the voice user interface for Raspberry Pi Series, which has been equipped 4 analogue microphones and AC108 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 carsvoice 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.

Application

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

Practical Tools Utilization

We here publish some widely useful tools that can be used in reSpeaker, for your convenience.


Enabling Voice Recognition at Edge with Picovoice

Picovoice enables enterprises to innovate and differentiate rapidly with private voice AI. Build a unified AI strategy around your brand and products with our speech recognition and Natural-language understanding (NLU) technologies.

Seeed has partnered with Picovice to bring Speech Recognition solutions on the edge using ReSpeaker 4 Mic for developers. You can follow up the wiki to configure the ReSpeaker with Raspberry Pi before using Picovoice.

Specifications

Specification

Details

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 1B+/2B/3B/3B+/4B

AC108 codec

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

Battery

Exclude

Dimensions

65mm x65mm x9mm

Weight

G.W 38g

Part List

reSpeaker 4-Mic Array for Raspberry Pix1


Attention

Due to the product software service life cycle has expired, Seeed Studio has ceased updating and maintaining software algorithms for the reSpeaker family of products. This series of products is only used as recording playback module, all algorithm functions need to be developed by yourself.

Note

  • Please note that the package does not contain Raspberry Pi.

  • Please note that there are no audio output interfaces on ReSpeaker 4-Mic Array for Raspberry Pi. It is only for voice capture. And you could use the headphone jack on Raspberry Pi for audio output.

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

Part List

ReSpeaker 4-Mic Array for Raspberry Pi 1

ECCN/HTS

HSCODE 8518900090
USHSCODE 8517180050
UPC 841454120049
EUHSCODE 8517180000
COO CHINA
EU DoC 1
RoHS 1

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