Espressif Systems ESP32 Series - ESP32-Lyratd-MSC Audio Development Board

4. Applications
Figure 25: Bottom View of ESP32-LyraT
4.1.2 ESP32-LyraTD-MSC Audio Development Board
ESP32-LyraTD-MSC is designed for smart speakers and AI applications. This audio development board con-
sists of two parts: the upper board, which provides a three-microphone array, function keys and LED lights; and
the lower board, which integrates ESP32-WROVER-B, a MicroSemi Digital Signal Processing (DSP) chip, and
a power management module. ESP32-LyraTD-MSC facilitates the quick and easy development of dual-mode
(Bluetooth + Wi-Fi) audio solutions, as it supports one-key Wi-Fi network configuration, Acoustic Echo Cancel-
lation (AEC), near/far-field voice wake-up, cloud platform access, voice recognition, wake-up interrupt and audio
decoding.
The ESP32-LyraTD-MSC smart audio board has the following features:
• A lightweight, low-power and cost-effective smart audio solution.
• Access to multiple cloud platforms including DuerOS, Amazon, Tmall Genie, Turing, JD and iFLYTEK.
• HTTP live streaming, such as Internet radio and Ximalaya.
• Voice wake-up optimized with speech recognition and echo cancellation.
• Three digital MICs support far-field voice pick-up (from a distance of one to five meters).
• The dual-board design integrates an LED light strip and fully-functional buttons.
• Audio inputs over Wi-Fi, BT, DLNA, SD-Card.
• A variety of network configurations, such as Smartconfig, BLE, and Air-kiss.
• Wi-Fi 802.11b/g/n, Classic BT and BLE in the 2.4GHz band.
• Multiple audio formats including M4A, AAC, FLAC, OGG, OPUS, MP3, AMR.
ESP32-LyraTD-MSC’s layout is shown in Figure 26.
Espressif Systems 21 ESP32 Hardware Design Guidelines V2.7