Play RSO Files Online
About RSO Files
An .rso file is an audio file saved in the NXT Brick Audio (RSO) format, a simple audio format used by LEGO Mindstorms NXT robots. RSO files store short sound clips, such as voice prompts, alerts, and sound effects, in a compressed, low-sample-rate format designed to work within the limited memory and processing capabilities of the NXT brick. The format prioritizes efficiency and fast playback over high-fidelity sound, making it suitable for robotic feedback and basic audio cues.
RSO files are commonly created when programming LEGO Mindstorms NXT robots using LEGO's official software or third-party development tools. They are typically transferred directly to the NXT brick and triggered by robot programs during operation. Outside of the LEGO robotics ecosystem, RSO files are rarely encountered, but they are of interest to educators, hobbyists, and robotics enthusiasts who customize sounds for their projects. Users can open and play .rso files on FileHelper.com by dragging them to this page.
Converting RSO Files
You can convert .rso files to other formats to make them easier to use on standard devices:
- Converting to MP3: Saves the audio in a common format supported by nearly all media players and operating systems, with lossy compression applied.
- Converting to AAC: Creates a compact, modern audio file that delivers efficient compression and solid playback quality on most newer devices.
About FileHelper.com
FileHelper.com is a free web-based file utility that can open NXT Brick Audio files and over 150 other file formats directly in your web browser. It displays file properties, including metadata, and image EXIF data, along with information about the corresponding file type. FileHelper.com can also view and convert images to several common formats. Have an unknown file or a file without an extension? No problem — FileHelper.com can identify over 15,000 file types.