New Audio Development Board by Espressif

ESP32-LyraTD-MSC is based on a digital signal processor (DSP) with a three-microphone array for noise reduction, echo cancelation, voice recognition, etc., and ESP32-WROVER, which is an Espressif module combining Wi-Fi and dual-mode (Classic and Low Energy) Bluetooth connectivity. The new audio development board achieves acoustic echo cancelation (AEC), while also being expandable with such peripheral devices as I2C, I2S and UART. ESP32-LyraTD-MSC consists of two development boards: the upper board with function keys and LEDs and the lower board which includes modules and chips.

ESP32-LyraTD-MSC specifications:

• Wireless Module: ESP32-WROVER with 802.11 b/g/n, dual-core 240MHz CPU and 4.5 MByte SRAM
• Wi-Fi and Bluetooth (Classic & Low Energy) connectivity.
• Digital Signal Processing chip
• Micro-SD card for storing audio files
• Audio:
  - Audio driver chip
  - Earphone jack
  - Dual speaker output ports
  - Three-microphone array supporting up to three-meter sensitivity when playing music

• Expansion:
  - I2C/SPI header
  - 6-pin UART header
  - I2S header

• Debugging: USB-UART micro-USB interface and JTAG header
• Power Supply: 5V via micro USB port

This audio development board can work over Wi-Fi and Bluetooth (Classic and Low Energy), supporting all major cloud voice vendors, such as Amazon Alexa, Google Assistant and Baidu DuerOS. Soft decoder and keyword recognition run directly on the ESP32 processor, targeting smart speakers, wireless audio and other home appliances.