Open RSO files with File Viewer Plus
Do you need to open an RSO file?
File Viewer Plus can open RSO (NXT Brick Audio File) files and offers various playback options. You can also convert RSO files to the common MP3 and MPEG-4 (M4A) formats.
Play RSO files with our easy-to-use audio player. Try File Viewer Plus for free today!
Free 14-day trial. 167 MB
What is an .RSO file?
RSO files are audio files saved in the NXT Brick (RSO) format for use with LEGO Mindstorms NXT devices. The format stores simple, uncompressed, or lightly encoded, audio data, typically used for short sound effects and voice clips played by the programmable brick. RSO files were designed specifically for NXT hardware and are not widely supported by standard media players.
You may encounter RSO files when programming LEGO Mindstorms robots, customizing sounds for NXT projects, or working with archived robotics files. File Viewer Plus can play RSO files and convert them to M4A or MP3 formats for broader compatibility with devices and media players.
About File Viewer Plus
File Viewer Plus is the universal file viewer for Windows. Why pay for dozens of software programs when you only need one? Install File Viewer Plus, and you'll be able open 400 file types with a single app.
You can also edit, save, print, and convert your files. Unknown file on your PC? No problem — the app's advanced file identification algorithm can identify over 10,000 file formats, including files with incorrect or missing file extensions. File Viewer Plus is the ultimate file viewer "plus" much more!
View all supported file types →