AudioToy is a set of modules to complement an 8x8 CS42448-based Teensy 4.0 audio board, providing fully balanced, software gain-controlled input and output modules.

Fully balanced or unbalanced microphone, line and instrument inputs are supported and the output stages can drive 600 ohm loads at +8dBm. Only a 5V supply is required.

All hardware information is available for open access at https://github.com/palmerr23/AudioToy with full schematics, BoM, Gerbers and design notes provided.

An ESP32 provides WiFi connectivity for remote control.

Top view
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From the front
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Front panel
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Rear panel
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