RadioMuos

Internet radio app for muOS handhelds, tested on the Anbernic RG35XX H.

RadioMuos is a lightweight SDL2 frontend for streaming radio stations through mpv, with a real-time ffmpeg visualizer and Radio Browser search.

Features

• Built-in SomaFM and public radio station list.
• Radio Browser search by name, tag, country, recent searches, and top stations.
• Favorites and recently played history persisted on device.
• Stream metadata display when the station exposes ICY metadata.
• Full-width audio visualizer with neon bars, spectrum, and waveform modes.
• Sleep timer and volume controls.
• No Python package dependencies; uses Python stdlib plus system SDL2/mpv/ffmpeg.

Install

Copy the app folder to your muOS SD card:

application/RadioMuos -> /MUOS/application/RadioMuos

Then open RadioMuos from the muOS Applications menu.

GitHub release ZIPs contain the same application/RadioMuos folder layout, so they can be extracted directly to the root of the muOS SD card.

Controls

Button	Action
D-pad	Move selection / switch tabs
A	Play selected station
B	Stop playback
Y	Toggle favorite
X	Cycle sleep timer
L1 / R1	Previous / next tab
R2	Search / browse menu
L2 / Volume Down	Volume down
Select / Volume Up	Volume up
L3	Toggle visualizer
R3	Cycle visualizer mode
Start	Quit

Runtime Files

RadioMuos creates state.json next to the app files to store volume, favorites, history, recent searches, Radio Browser cache, and visualizer state. This file is intentionally ignored by git.

Notes

• The visualizer uses a separate ffmpeg process reading the same stream as mpv. The default neon bars mode reads low-rate PCM and draws clean colorful bars in Python; spectrum/waves modes use ffmpeg video filters. HLS streams are read with -re to avoid bursty frame updates.
• Radio Browser lists are cached for one day so tag/country browsing still opens quickly after the first load.
• If a stream ends or fails, the now-playing panel reports the mpv event instead of staying stuck on buffering.