ESP32-LyraT-Mini V1.2 Audio Development Board Espressif Systems ESP32-LyraT-Mini V1.2 Audio Development Board is a hardware platform designed for dual-core ESP32 audio applications. These applications include Wi-Fi or BT audio speakers, speech-based remote controllers, and connected smart-home appliances with one or more audio functionalities. The ESP32-LyraT-Mini is a mono audio board. The ESP32-LyraT-Mini Board provides hardware for audio processing and additional RAM on top of what is already on board the ESP32 chip.