Record and Playback Audio Assist Board, ESP32-Based

Description This versatile audio board is built around the ESP32 and designed to support key audio functions such as I2S microphone recording, microSD card file playback (WAV, MP3, etc.), and amplified audio output. It’s ideal for embedded audio projects and can be extended with AI features as needed. Key Features �� Microphone Recording Dual onboard I2S microphones with: High Signal-to-Noise Ratio (SNR) of 65 dBA Wideband frequency response ±1 dB sensitivity tolerance �� MAX98357 Class D Audio Power Amplifier Output Power: 3.2W @ 4Ω, THD 10% 1.8W @ 8Ω, THD 10% I2S Sampling Rate: 8kHz – 96kHz No master clock (MCLK) required Selectable amplifier gain: 3dB / 6dB / 9dB / 12dB / 15dB Plug-and-play functionality �� Integrated Audio Amplifier Built-in Anti-Clipping Function (ACF) to reduce distortion Excellent EMI suppression across full bandwidth Free digital filter modulation with direct speaker drive High SNR: 95 dB (VDD = 6.5V, Av = 24dB, THD N = 1%) Output Power: 2.8W @ 5V (RL = 4Ω, THD N = 10%) Ultra-low quiescent current �� microSD Card Interface Bit-3 MMC mode support for reading files Compatible with Bit-1 SPI mode as well ⚡ Onboard DC-DC Regulator Wide input voltage range: 4.2V – 18V Output current: up to 2A �� Compatibility Notice This board is only compatible with our NWI1100 or NWI1206 boards. Please ensure proper pin alignment when using. You can search for these models for more details. �� Resources Documentation, demo code, and further technical details are available on this page.