Sample-Based Virtual Radio and Tape Playback Module

Radio Music mk2 is a specialized sample playback module that simulates radio tuning, tape loop manipulation, and vintage digital sampler playback within a Eurorack system.

Designed by Tom Whitwell and Chris Johnson, this updated 2026 version rebuilds the original 2014 DIY module from the ground up with high-fidelity 24-bit / 96kHz audio support, an RP2040 processor, and a front-panel USB-C port. It reads field recordings, drum loops, spoken word stems, or audio files organized across 16 bank folders on a microSD card, letting you tune through audio files like scanning stations on an AM/FM receiver.

In performance, the module bridges the gap between hands-on selector and calibrated pitch instrument. The Station control selects individual files, while the Start control defines playback jump points or toggles directly into dynamic speed and pitch control mode. You can adjust playback smoothly from +2 to -2 octaves in fluid Tape mode, lock to 1V/Oct pitch CV, or engage a gritty, lo-fi '90s pitch algorithm inspired by classic hardware samplers. For expanded tactile control, connecting the optional USB-C Radio Remote unlocks immediate hardware access to looping modes, clock division, and alternative tuning behaviors.

While the mk2 architecture introduces an expanded feature set and cleaner audio path, existing original units cannot be updated via firmware to add mk2 features due to fundamental hardware changes and the lack of a USB-C port.