Overview
ESP audio development boards, powered by ESP32, ESP32-S2 and ESP32-S3 SoCs, are designed for audio applications such as smart speakers, voice robots, story-teller machines and other voice-controlled devices used in smart-home solutions. They provide out-of-the-box voice enablement, and support connection to multiple voice platforms.
Top-Notch Audio Solutions
Espressif’s audio boards provide advanced Wi-Fi + Bluetooth dual-mode audio solutions that can be easily and quickly implemented, supporting music-playing from multiple sources, such as HTTP, HLS (HTTP Live Streaming), SPIFFS, SDCARD, A2DP-Source, A2DP-Sink, HFP, etc. To this end, a number of different audio formats are supported, such as MP3, AAC, FLAC, WAV, OGG, OPUS, AMR, TS, ALC, and G.711.
Extensive Applications
ESP audio boards support one-key Wi-Fi configuration, voice wake-up, voice recognition and cloud-platform access. They are designed for the development of audio and AIoT applications, e.g., Wi-Fi or Bluetooth speakers, speech-based remote controllers, voice robots, smart toys and connected smart-home appliances with a wide-ranging audio functionality.
ESP Audio SDKs
Espressif’s SoCs are not just about connectivity. With integrated Wi-Fi and Bluetooth interconnection capacity, excellent computing power and a rich set of peripherals, Espressif offers a complete solution for various types of voice and audio applications. Espressif’s audio SDKs assist with the implementation of smart speakers, web radios, voice assistants and voice-controlled devices, in general. They also support out-of-the-box connectivity to various platforms, such as Amazon’s AVS and Amazon Lex, Google’s Voice Assistant and Google DialogFlow, DuerOS, TmallGenie, XiaoAi, etc.
ESP-ADF
ESP-ADF is the official audio development framework for the ESP32 and ESP32-S2 SoCs. With ESP-ADF, you can easily add features, and develop a number of different audio applications ranging from simple to complex ones. ESP-ADF supports connection to various voice platforms.
ESP-VA-SDK
The ESP-Voice-Assistant SDK provides an implementation of Amazon's Alexa Voice Service, Google’s Voice Assistant, and Google's conversational interface (Dialogflow) for the ESP32 microcontroller.
ESP-Skainet
ESP-Skainet is Espressif’s speech recognition SDK targeting voice-controlled devices. ESP-Skainet can operate completely offline, without depending on cloud connectivity. Both wake-word and speech-command (phrase) detections happen locally on Espressif SoCs. ESP-Skainet takes advantage of various acoustic algorithms, such as voice-activity detection, acoustic echo cancellation, noise reduction and beamforming. As a result, ESP-Skainet achieves enhanced acoustic performance.
Related Audio Hardware
ESP32-S3-Korvo-2
ESP32-S3-Korvo-2 is an ESP32-S3 based multimedia development board. It is equipped with a two-microphone array which is suitable for voice recognition and near/far-field voice wake-up applications. The board integrates multiple peripherals such as LCD, camera, and TF. It also supports JPEG video stream processing. With all of its outstanding features, the board is an ideal choice for the development of low-cost and low-power audio and video products.
ESP32-S2-Kaluga-1 is based on ESP32-S2, and has various features, such as an LCD screen display, touch panel control, camera image acquisition, audio playback, etc. It can be flexibly assembled and disassembled, thus fulfilling a variety of customized requirements.
ESP32-S2-Kaluga-1
(Audio extension board: ESP-LyraT-8311A)
ESP32-LyraT
ESP32-LyraT is a standard hardware platform supporting recording, audio playback, and simple IoT controls. It's designed for dual-core ESP32 audio applications, e.g., Wi-Fi or Bluetooth audio speakers, story-teller machines, reading pens, etc.
ESP32-LyraT-Mini is a lightweight audio development board based on ESP32-WROVER-E, which implements wake-word engine and front-end acoustic algorithms such as AEC, AGC and NS.
ESP32-LyraT-Mini
ESP32-LyraTD-MSC
ESP32-LyraTD-MSC consists 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-E, a Microsemi-DSP chip, and a power management module. It effectively supports far-field voice solutions, such as smart speakers, smart lamps and other voice-controlled appliances in smart-home applications.
ESP32-LyraTD-DSPG is based on the ESP32-WROVER-B module and a digital signal processor (DSP) that features a three-microphone array for noise reduction, echo cancellation, beamforming and wake-word detection. ESP32-LyraTD-DSPG consists of two development boards. The main board integrates power management, as well as Wi-Fi and audio modules like DSP, codec and power amplifier. The sub-board mainly consists of the microphone array, function keys and LEDs.
ESP32-LyraTD-DSPG
ESP32-LyraTD-SYNA
ESP32-LyraTD-SYNA is one of Espressif’s Audio Development Boards based on the ESP32 MCU and Synaptics’ DSP. It is an Acoustic Echo Cancelation (AEC) solution, supporting voice recognition and voice wake-up. It also supports connection to Amazon’s AVS (Alexa Voice Service), Google's Dialogflow and GVA (Google Voice Assistant).
ESP32-Vaquita-DSPG is an Alexa built-in solution powered by ESP32 and DSP Group’s DBMD5P audio SoC. The board, together with ESP AVS (Alexa Voice Service), provides a turnkey solution to easily create built-in Voice Assistant connected devices.
ESP32-Vaquita-DSPG
ESP32-Korvo
ESP32-Korvo is an ESP32-based audio development board with a microphone array. Together with Espressif's speech recognition SDK, ESP-Skainet, ESP32-Korvo is suitable for far-field speech recognition applications that need to achieve low power consumption. ESP32-Korvo is composed of two boards: the main board contains the ESP32-WROVER-E module, a power port, a micro-SD-card slot, earphone and speaker connectors; the sub-board contains a microphone array, function buttons and LEDs.
ESP32-Korvo-DU1906 is an Espressif audio development board with an ESP32-DU1906 module at its core. This board is designed to provide not only advanced end-to-end audio solutions with highly efficient AI capabilities, but also a Cloud + End integrated device-level AIoT platform, which significantly lowers the barrier to building AI capabilities in IoT devices.
ESP32-Korvo-DU1906
| Boards | Related Module | Supported SDKs | DSP (Digital Signal Processing) Chip | Flash / PSRAM | Interfaces | UI |
|---|---|---|---|---|---|---|
| ESP32-S3-Korvo-2 | ESP32-S3-WROOM-1 | ESP-ADF | N/A | 16 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, MicroSD Slot, LCD Connector, Speaker Connector, Battery Connector | Function Buttons, Microphone Array, LCD Screen, Camera |
| ESP32-S2-Kaluga-1 (Audio extension board: ESP-LyraT-8311A) | ESP32-S2-WROVER | ESP-ADF | N/A | 4 MB Flash + 2 MB PSRAM | I2S, I2C, JTAG, USB, UART, LCD FPC Connector, Camera Header, Extension Header, Touch FPC Connector, Battery Port, ESP Prog Connector | Buttons, Function Keys, LED, Touch, LCD Screen, Speaker, Microphones, Camera |
| ESP32-LyraT | ESP32-WROVER-E | ESP-ADF ESP-VA-SDK ESP-Skainet |
N/A | 4 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, MicroSD Slot, Audio Output, Speaker Output | Buttons, Function Keys, LEDs, Microphones |
| ESP32-LyraT-Mini | ESP32-WROVER-E | ESP-ADF ESP-VA-SDK ESP-Skainet |
N/A | 4 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, MicroSD Slot, Audio Output, Speaker Output | Buttons, Function Keys, LEDs, Microphones |
| ESP32-LyraTD-MSC | ESP32-WROVER-E | ESP-ADF ESP-VA-SDK ESP-Skainet |
Microsemi’s Zl38063 Chip | 4 MB Flash + 8 MB PSRAM | I2S, I2C, SPI, JTAG, USB, UART, MicroSD Slot, Audio Output, Speaker Output | Buttons, Function Keys, LEDs, Microphones |
| ESP32-LyraTD-DSPG | ESP32-WROVER-B | ESP-VA-SDK | DSP Group’s DBMB5P Chip | 16 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, USB, Earphone Connector, Speaker Connector, FPC Connector, Mini Din Connector | Buttons, LEDs, Microphones |
| ESP32-LyraTD-SYNA | ESP32-WROVER-E | ESP-VA-SDK | Synaptics’s Cx20921 Chip | 16 MB Flash + 8 MB PSRAM | I2S, I2C, SPI, JTAG, USB, UART, FPC Connector, Earphone Jack, Speaker Output | Buttons, LEDs, Microphones |
| ESP32-Vaquita-DSPG | ESP32-WROVER-E | ESP-VA-SDK | DSP Group’s DBMB5P Chip | 16 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, Speaker Connector, Earphone Connector, FPC Connector | Buttons, Function Keys, LEDs, Microphones |
| ESP32-Korvo | ESP32-WROVER-E | ESP-Skainet | N/A | 16 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, Micro SD Card, Speaker Connector, Earphone Connector, FPC Connector | Function Buttons, LED, Analog Microphone |
| ESP32-Korvo-DU1906 | ESP32-WROVER-E | ESP-ADF | Baidu’s DU1906 Chip | 8 MB Flash + 8 MB PSRAM | I2S, I2C, JTAG, USB, UART, MicroSD Slot, LCD Connector, Speaker Connector, Earphone Jacks, Battery Connector | Function Buttons, Microphone Array, LEDs |
