Pedalboard Soundcard

I²S audio codec HAT for Raspberry Pi — ADC + DAC for the Open Pedalboard system.

Documentation →

Features

• TI Burr-Brown PCM1863 ADC (106dB SNR) + PCM5242 DAC (112dB SNR)
• Stereo differential input (guitar) + stereo output (amp)
• I²S interface to Raspberry Pi GPIO header
• Low-latency audio path for real-time effects
• Raspberry Pi HAT form factor

Links

• Interactive schematic & PCB viewer
• Digi-Key shared list

Development Setup

Prerequisites

• KiCad 10+
• KiKit (panelization)
• mise (environment management)

Environment

The schematic references KiKit's symbol and footprint libraries via the ${KIKIT_LIB} environment variable. This is set per-machine using a mise.local.toml file (gitignored).

After cloning, create mise.local.toml in the project root:

[env]
KIKIT_LIB = "/path/to/kikit/resources"

Find your KiKit resources path with:

python3 -c "import kikit, os; print(os.path.join(os.path.dirname(kikit.__file__), 'resources'))"

Then trust the config:

mise trust mise.local.toml

Checks

Run ERC and DRC:

make test

Acknowledgements

Based on Dave Vandenbout's RPi Hat Template. Schematics derived from Jośe Fernando Moyano's ZynADC (CC BY-SA 4.0).

License