ESP32 Ambisonics Recorder Kit: Capture Spatial Audio in Real Time

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

This four-microphone array kit turns an ESP32 into a portable first-order ambisonics recorder. With four INMP441 I2S MEMS mics feeding the ESP32's processing pipeline, you compute B-format (W, X, Y, Z) channels in real time - no post-production stitching required. Field recordists, VR audio creators, and embedded DSP engineers get a self-contained tool for capturing full-sphere soundscapes directly to a microSD card or over USB.

What You'll Build

You'll assemble a PCB-based microphone array that digitises each channel synchronously via I2S, processes the four signals through an ambisonic encoder running on the ESP32, and outputs either line-level B-format audio through TRS jacks or decoded stereo monitoring through the dual PAM8403 amplifier and speakers. The finished unit sits in a compact enclosure, powered by a 5V supply, ready for indoor ambisonic recordings, VR demo sessions, or acoustic research.

What You'll Learn

• Interface four INMP441 I2S MEMS microphones on a single I2S bus with perfect sample alignment
• Implement real-time B-format ambisonics encoding in C on the ESP32 using fixed-point or floating-point DSP
• Design a multi-channel audio output stage with MCP4728 DAC, PAM8403 amplifiers, and 3W speakers for monitoring
• Master PCB prototyping, power supply filtering, and enclosure assembly for a finished portable recorder

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This advanced kit suits IIT, NIT, and BITS Pilani research labs exploring spatial audio, B.Tech ECE/EEE graduates prototyping ambisonic recorders for their M.Tech theses, and independent audio engineers building custom field recording rigs for VR content. It is also ideal for Smart India Hackathon teams tackling acoustic sensing challenges that require real-time multichannel capture.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.

Choose your assembly option:

• Soldering Kit - 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
• Breadboard Combo - 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.