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

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

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 https://github.com/palmerr23/AudioToy with full schematics, BoM, Gerbers and design notes provided.

An ESP32 provides WiFi connectivity for remote control.

Read all the details here: https://www.pjrc.com/audiotoy-8x8-channel-audio-mixer/

A forum post can be found here: https://forum.pjrc.com/index.php?threads/queued-audiotoy-modular-8x8-channel-teensy-4-0-pro-grade-audio-mixer-hardware.68166/

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.