AudioToy 8x8 Channel Mixer With Pro-Level I/O

US CS42448-based device using Teensy      21/02/24

AudioToy 8x8 Channel Mixer With Pro-Level I/O

The Teensy is known for all kinds of audio projects; samplers, synths, drum machines - you name it! In this particular case, we have a modular audio mixer, made by Teensy forum member Palmerr. It features pro-grade fully balanced, software gain-controlled line/instrument inputs and 600 ohm/+8dBm outputs, with combination XLR/TRS sockets. It also uses an ESP32 to allow remote control via Wi-Fi and a WS2812B LED strips indicate channel levels.

Complete hardware details for its component modules, as well as a user manual, can be found on GitHub.

Here is a description of the project in his words: 

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 with full schematics, BoM, Gerbers and design notes provided.

An ESP32 provides WiFi connectivity for remote control.

Read all the details here:

A forum post can be found here:

About the author [midierror]: midierror makes nifty Max For Live devices, innovative music hardware, award winning sample packs and hosts a podcast speaking to people in the music world.

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