M5Stack Atomic Voice Base

This Atomic Voice Base (previously Echo Base) is a voice recognition module made for the M5 Atom series and has audio input and output capabilities. It combines an ES8311 mono audio decoder, a MEMS microphone, and an NS4150B power amplifier to give a great audio experience.

The ES8311 supports 24-bit audio resolution and operates at sample rates from 16KHz to 64KHz, using I2S communication for level audio processing. The MEMS microphone provides a high signal-to-noise ratio (SNR), making it ideal for speech recognition. Paired with a built-in speaker, you can hear your voice with a clear sound output.

With full-duplex communication, the Voice Base can handle voice input and output simultaneously. This makes it well-suited for tasks like voice commands, speech recognition, wake-up functions, and real-time audio playback.

Features

• Compatible with the M5 Atom series
• Voice recognition
• Mono audio codec
• MEMS microphone
• Class-D amplifier
• Speaker
• Development platform
  • UIFlow 1.0
  • UIFlow 2.0
  • Arduino IDE

Specifications

Audio Codec	ES8311: 24-bit resolution, I2S protocol
MEMS Microphone	MSM381A3729H9BPC, SNR ≥ 65 dB
Power Amplifier	NS4150B: Class-D power amplifier
Speaker	2014-type cavity speaker: 1W@8Ω
Standby Current	DC3.3V/3.36mA
Operating Current	DC3.3V/14.84mA
Operating Temperature	0 - 40°C
Product Size	24.0 x 24.0 x 14.14mm
Product Weight	6.3g
Packaging Size	85.0 x 65.5 x 15.0mm
Packaging Weight	12.5g

Resources

• Product Wiki

Package Contents

• 1x Atomic Voice Base