ReSpeaker Mic Array V2.0

The ReSpeaker Mic Array V2.0 is a hardware-based solution for creating or adding voice-interface to your projects. The board is a far-field microphone array device capable of detecting voices up to 5m away even with the presence of background noise. The onboard hardware-enabled algorithms are powered by the XMOS XVF-3000.

The ReSpeaker Mic Array V2.0 is based on XMOS’s XVF-3000, a significantly high-performing chipset. This new chipset includes many voice recognition algorithms to assist in performance. The array can be stacked (connected) right onto the top of the original ReSpeaker Core to significantly improve the voice interaction performance. The microphones have also been improved in this version 2.0, allowing significant performance improvements over the first generation mic array with only 4 microphones.

The ReSpeaker Mic Array V2.0 supports USB Audio Class 1.0 (UAC 1.0) directly. All major Operating Systems, including Windows, macOS, and Linux are compatible with UAC 1.0, allowing the mic array to function as a sound card without the ReSpeaker Core, while also retaining voice algorithms, such as DoA, BF, and AEC on those systems.

The ReSpeaker Mic Array V2.0 is a great solution for those who wish to add a voice interface into their existing products or future products. It also works well as an entry point to higher-level voice interface evaluation. The board allows some flexibility for customization upon request.

It has two firmware versions available, one including speech algorithms and a second for raw voice data.

Hardware overview:

• ① XMOS XVF-3000: It integrates advanced DSP algorithms that include Acoustic Echo Cancellation (AEC), beamforming, dereverberation, noise suppression, and gain control.

• ② Digital Microphone: The MP34DT01-M is an ultra-compact, low power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface.

• ③ RGB LED: Three-color RGB LED.

• ④ USB Port: Provides the power and controls the mic array.

• ⑤ 3.5mm Headphone jack: Output audio, We can plug active speakers or Headphones into this port.

• ⑥ WM8960: The WM8960 is a low-power stereo codec featuring Class D speaker drivers to provide 1 W per channel into 8 W loads.

• Pick Up Voices From Far Away
  • Far-field voice capture enables you to capture and understand requests from up to 5m away
• Focus On The Right Voice
  • DoA allows the device to know the direction of a source
  • BF allows the device to focus only on sounds that come from the target direction
  • Ignore background noise and chatter through NS
• Improved Voice Audio Quality
  • Reduces environmental voice echo with de-reverberation
  • Remove current audio output with AEC

Applications:

• USB Voice Capture
• Smart Speaker
• Intelligent Voice Assistant Systems
• Voice Recorders
• Voice Conferencing System
• Meeting Communicating Equipment
• Voice Interacting Robot
• Car Voice Assistant
• Other Voice Interface Scenarios

• Far-field voice capture
• Support USB Audio Class 1.0 (UAC 1.0)
• Four microphones array
• 12 programmable RGB LED indicators
• Speech algorithms and features
  • Voice Activity Detection
  • Direction of Arrival
  • Beamforming
  • Noise Suppression
  • De-reverberation
  • Acoustic Echo Cancellation

Specification:

• XVF-3000 from XMOS
• 4 High-Performance Digital Microphones
• Supports Far-field Voice Capture
• Speech Algorithms On-Chip
• 12 Programmable RGB LED Indicators
• Microphones: MEMS MSM261D4030H1CPM
• Sensitivity: -26 dBFS (Omnidirectional)
• Acoustic Overload Point: 120 dB SPL
• SNR: 63 dB
• Power Supply: 5V DC from Micro USB or Expansion Header
• Dimensions: 70mm (Diameter)
• 3.5mm Audio Jack Output Socket
• OS compatibility:
  • Linux
  • macOS
  • Windows

• 1 x ReSpeaker Mic Array V2.0

• ReSpeaker Mic Array V2.0, SeeedStudio wiki page
• ReSpeaker forum