Audio Latency Tester Board
This project contains open hardware design files for an audio latency processing board. The system allows driving an external speaker and collecting audio samples from a pair of PDM or I2S microphones. The board was designed to work with a host processing platform that generates playback and processes the captured audio samples.
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Audio Latency Tester Board
Copyright (c) 2024-2025 Antmicro
Overview
This project contains open hardware design files for an audio latency processing board. The system allows driving an external speaker and collecting audio samples from a pair of PDM or I2S microphones. The board was designed to work with a host processing platform that generates playback and processes the captured audio samples.
The design files were prepared in KiCad 8.x.
Key features
- 2x RP2040 MCU
- MAX98357A, I2S Class D Amplifier
- Zero insertion force connectors for a 5 pin, 0.5 mm pitch FFC
- 32Mb SerialRAM for playback sample buffering
- Various I/O configurations for trigger signals
- Small form factor: 80mm x 40mm
Project structure
The main directory contains KiCad PCB project files, a LICENSE, and a README. The remaining files are stored in the following directories:
doc- contains schematics in PDF formatassets- contains visual assets for showcasing this design on Open Hardware Portal and System Designer
Licensing
This project is published under the Apache-2.0 license.
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