# Louder ESP32 > ESP32 audio development board with TAS5805M I2S Class-D amplifier delivering 2x23W stereo output, designed for multi-room audio, network streaming, and smart home integration. ## Quick Facts - **Brand:** Sonocotta - **Board Type:** audio-board - **Price:** ~$24 - **Product Readiness:** consumer - **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, AES/SHA hardware crypto - **CPU Architecture:** Xtensa LX6 - **CPU Cores:** 2 - **RAM:** 520KB SRAM - **PSRAM:** 8MB PSRAM (QSPI) - **Flash:** 8MB - **USB:** Micro-USB (programming) - **Power:** 4.5-26V external PSU - **Operating Voltage:** 3.3V - **Operating Temp:** -40°C to +85°C - **Dimensions:** 85.6 × 56.5mm (RPi 4 form factor) - **Antenna:** Built-in PCB antenna (U.FL/IPEX on external variant) ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** BT 4.2 + BLE - **Ethernet:** Optional W5500 SPI module ## Open Source - **Firmware:** Yes - **Schematics:** Yes - **PCB Layout:** Yes ## Compatible Firmware esphome, squeezelite, snapcast, arduino, platformio ## Use Cases - multi-room-audio - network-audio-player - hi-fi-audio - home-automation - dsp-audio-processing - voice-assistant ## Components - **ESP32-WROVER-N8R8** (mcu): Espressif ESP32-WROVER module with Xtensa LX6 dual-core processor at 240MHz, 8MB flash, 8MB PSRAM, WiFi 802.11 b/g/n, Bluetooth 4.2, and hardware crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wrover-e_esp32-wrover-ie_datasheet_en.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export) - **TAS5805M** (audio-amplifier): Texas Instruments closed-loop Class-D stereo amplifier with integrated I2S DAC and DSP. Delivers 2x23W at 8 ohms (1% THD+N) or 45W bridged mono at 4 ohms. Features 15-band parametric EQ, 128-tap FIR filter, 3-band DRC, automatic gain limiter, and 107dB SNR. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftas5805m.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export) - **WS2812B** (led-driver): WS2812B addressable RGB LED for status indication, controllable via single-wire protocol from ESP32 GPIO. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export) ## Protocols - **I2S** (I2S0): CLK: GPIO26, DATA: GPIO22, WS: GPIO25 - **I2C** (I2C0): SDA: GPIO21, SCL: GPIO27 - **SPI** (SPI0): CLK: GPIO18, MOSI: GPIO23, MISO: GPIO19, CS: GPIO5 - **UART** (UART0): TX: TX0, RX: RX0 ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO26 | I2S CLK | I2S | digital-output, pwm, adc, dac | | GPIO22 | I2S DATA | I2S | digital-input, digital-output, pwm | | GPIO25 | I2S WS | I2S | digital-output, pwm, adc, dac | | GPIO21 | I2C SDA | I2C | digital-input, digital-output, pwm | | GPIO27 | I2C SCL | I2C | digital-input, digital-output, pwm, adc, touch | | GPIO33 | DAC PWDN | GPIO | digital-input, digital-output, pwm, adc, touch | | GPIO34 | DAC FAULT | GPIO | digital-input, input-only | | GPIO39 | IR Input | GPIO | digital-input, input-only | | GPIO12 | RGB LED Output | GPIO | digital-input, digital-output, pwm, adc, touch | | GPIO18 | SPI CLK | SPI | digital-input, digital-output, pwm | | GPIO23 | SPI MOSI | SPI | digital-input, digital-output, pwm | | GPIO19 | SPI MISO | SPI | digital-input, digital-output, pwm | | GPIO5 | SPI CS (Ethernet) | SPI | digital-input, digital-output, pwm | | GPIO15 | SPI CS (OLED) | SPI | digital-input, digital-output, pwm, adc, touch | | GPIO4 | OLED DC | GPIO | digital-input, digital-output, pwm, adc, touch | | GPIO32 | OLED RST | GPIO | digital-input, digital-output, pwm, adc, touch | ## Description ## Overview The Louder ESP32 by Sonocotta is an ESP32-powered audio development board that pairs a dual-core ESP32-WROVER module with a TAS5805M I2S DAC and Class-D amplifier. It delivers 2x23W stereo output at 8 ohms or 45W bridged mono at 4 ohms, making it capable of driving full-size passive speakers for living room or whole-home audio setups. The TAS5805M's integrated DSP provides 15-band parametric EQ, 128-tap FIR filtering, 3-band dynamic range compression, and automatic gain limiting — all configurable over I2C. Designed in a Raspberry Pi 4-compatible form factor, the Louder ESP32 fits standard Pi enclosures and supports optional add-ons including a 128x64 OLED display, W5500 Ethernet module for wired networking, and an INMP441 MEMS microphone for voice capture. The board accepts a wide power input range of 4.5V to 26V, allowing it to be powered from anything from a USB-C charger to a dedicated audio PSU. The board ships with multiple firmware options out of the box: Squeezelite-ESP32 for Logitech Media Server, Spotify Connect, and AirPlay streaming; Snapclient for synchronized multi-room audio; and ESPHome for Home Assistant integration with text-to-speech announcements and media playback. Both hardware schematics and firmware are fully open-sourced under Apache 2.0 on GitHub, with browser-based web installers available for one-click firmware flashing. Available in four variants — ESP32 or ESP32-S3, each with built-in PCB antenna or external U.FL/IPEX antenna connector — the Louder ESP32 serves as a versatile platform for network audio players, voice notification systems, DSP experimentation, and custom audio device prototyping. ## Where to Buy - [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Fsonocotta%2Flouder-esp32%2F&ref=openhardware.directory&product=louder-esp32&source=md-export) — $24.00 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fsonocotta.com%2Flouder-esp32%2F&ref=openhardware.directory&product=louder-esp32&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fesp32-audio-dock&ref=openhardware.directory&product=louder-esp32&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fesp32-audio-dock%2Fblob%2Fmain%2FREADME.md&ref=openhardware.directory&product=louder-esp32&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.ti.com%2Flit%2Fds%2Fsymlink%2Ftas5805m.pdf&ref=openhardware.directory&product=louder-esp32&source=md-export) - [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fsonocotta%2Fesp32-audio-dock%2Ftree%2Fmain%2Fhardware&ref=openhardware.directory&product=louder-esp32&source=md-export) ## Tags `esp32`, `audio`, `i2s`, `class-d-amplifier`, `tas5805m`, `multi-room-audio`, `network-audio`, `esphome`, `squeezelite`, `snapcast`, `home-assistant`, `dsp` ## Images ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/6cde243cbcc7.JPG) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/1f87d74ad80b.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/4e5711cc21c0.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/0240072cd2c2.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/2b52eba0555a.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/0dd98bcf821d.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/7419878082da.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/489380481860.jpeg) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/b24e88d0d2ec.JPG) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/b4f32baf19d2.JPG) ![Louder ESP32](https://nbg1.your-objectstorage.com/openhardware-directory/entities/louder-esp32/1aae6b97f96c.JPG) --- [View full device page](https://openhardware.directory/devices/louder-esp32)