ESP32-LYRATD-MSC - Audio Development Boards, Acoustic Echo Cancelation (AEC)

ESP32-LyraTD-MSC, one of Espressif’s Audio Development Boards, is an Acoustic Echo Cancelation (AEC) solution supporting voice recognition, near-field and far-field voice wakeup.

Key Features

• USB power input
  • Provides power supply to the whole system.
  • It is recommended that the system be connected to a power adapter for sufficient current supply.
• Battery interface
  • Provides power supply to the whole system when the USB power interface is not used
  • The development board integrates the AP5056 power management IC to support battery charging.
• Power switch
  • Turn on the switch and the system will be powered on.
  • Turn off the switch and the system will be powered off.
• IS port
  • An IS bus transmits audio data between ESP32 and the DSP.
• ESP32-WROVER-B module
  • This is a powerful, general-purpose, Wi-Fi+BT+BLE MCU module, targeting a wide
    variety of applications ranging from low-power sensor networks to the most demanding
    tasks, such as voice encoding, music streaming and MP3 decoding.
• MicroSemi DSP
  • This audio co-processor is used for Automatic Speech Recognition (ASR) applications. It
    captures audio data from an external microphone array and outputs audio signals
    through its Digital-to-Analog-Converter (DAC) port.
• IC/SPI port
  • ESP32, as an IC master, can access slave devices via the IC bus.
  • ESP32, as an SPI master, can access the DSP to read/write data via the SPI bus.
• Earphone jack
  • Used for plugging in earphones.
• Dual speaker output port
  • Supports two external speaker outputs.
• Audio driver
  • This audio power amplifier sends audio signals from the DSP to external speakers for playback.
• DC-DC boost power supply
  • This fixed-frequency DC-DC voltage booster powers the audio driver.
• Micro SD card
  • The development board supports a Micro SD card in SPI/1-bit/4-bit modes, and can
    store or play audio files in the Micro SD card.
• JTAG port
  • This standard JTAG interface is compatible with the ESP32 programming board and
    supports debugging functions.
• CP2102N USB-UART Chip
  • An upgraded version of the CP2102 chip supports USB-to-UART conversion.
• Programming port
  • This programming and debugging interface of ESP32 is compatible with the ESP32
    programming board.
• USB Communication Port
  • This is a normal USB communication port between PC and ESP32 module.

Resources

User Guide