Brickley Roscowicz Engineering has released rsoplay, a utility that plays LEGO Mindstorms NXT “.rso” sound files. To complement this Mac-compatible tool, I’ve created RSOPlayer, a wrapper for rsoplay that provides enhanced Mac OS X desktop integration.
You can drag RSO files onto RSOPlayer to play them. You can double-click RSOPlayer to select files to play with a file browser. You can even assign RSOPlayer as the default application for RSO files, so that double-clicking an RSO file will automatically play it.
Download RSOPlayer 1.0 (162k)
The download includes the rsoplay 0.1.0 source distribution as well as the RSOPlayer application and source code. RSOPlayer is a Universal Binary and probably requires at least Mac OS X 10.4.