ESP32 Beamforming Microphone Array Kit — Steerable Audio Zoom with 4 INMP441 Mics

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

Capture sound with surgical precision. This kit lets you build a 4-element microphone array that uses delay-and-sum beamforming to steer a virtual microphone electronically — zooms toward any sound source in real time, rejecting noise from all other directions. From acoustic camera experiments to spatial audio capture for AR/VR, the ability to electronically steer a microphone array opens a powerful door. This kit delivers every analog and digital component, pre-tested for I2S synchronization, so you focus on algorithm development instead of hardware debugging.

What You'll Build

Build a standalone, steerable microphone array that captures clean directional audio without moving parts. The final assembly fits inside the included case, connects to any recorder or analyzer via 3.5 mm TRS, and responds to real-time angle commands from the ESP32's touch interface or serial input — you literally point the beam anywhere within 180 degrees.

What You'll Learn

• Implement delay-and-sum beamforming in C on FreeRTOS
• Capture and synchronize 4-channel I2S streams from INMP441 microphones
• Configure MCP4728 DAC and PAM8403 amp for low-noise output
• Optimize real-time audio DSP for ESP32's dual-core Xtensa processor
• Design a scalable FIR filter bank for beamforming weights

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is designed for practicing audio engineers, DSP developers, and advanced hobbyists. Ideal for B.Tech and M.Tech ECE students building final-year projects on microphone arrays, participants in Smart India Hackathon and acoustic localization challenges, and professionals prototyping beamforming conference systems or spatial audio recorders for institutions like IITs, NITs, and corporate R&D labs.

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.