Espressif ESP32 WiSoC can be integrated into various applications, and earlier this year Espressif Systems released ESP32 LyraTD MSC Audio Mic HDK (Hardware Development Kit) which I could test with Baidu DuerOS using Mandarin. Since then the company released the ESP-ADF Audio Development Framework that beside Baidu DuerOS, now supports Google Assistant and Amazon Alexa, so you don’t need to speak or learn Chinese to use the kit! 🙂

Another ESP32 audio board was the similarly named ESP32-LyraT, and now we have at least more more option with Seeed Studio selling ESP32-A1S WiFi + Bluetooth ESP32 audio development kit for $16.90 on their store.

ESP32-A1S ESP32 audio development kit specifications:

Wireless Module A.I. Thinker ESP32-A1S module based on ESP32 dual core Tensilica CPU clocked at up to 240MHz with 520 KB SRAM, and 8MB on-module PSRAM 802.11 b/g/n WiFi and Bluetooth 4.2 LE

Storage – Micro SD card slot up to 64GB

Audio 3.5mm headphone jack for stereo audio output 3.5mm LINE-IN jack 2x 2-pin header for left and right speakers up to 4Ω/3W output 2x built-in microphones

Expansion Headers – Unpopulated headers with UART, SPI, I2C, PWM

Debugging – Unpopulated JTAG header, 1x micro USB port for UART access

Misc – 6x user buttons

Power Supply – 5V/2A via micro USB; support for 3.7V Li-ion battery via 2-pin header

Dimensions – 65 x 58 x 10 mm

The board also supports Espressif ESP-ADF framework, and you’ll find documentation such as schematics, user guides, and link to demos on the product page on Seeed Studio linked in the first part of this post.

The kit targets the development of audio and audio IoT applications such as smart home devices, smart speakers, story machine solutions, and so on.