I've noticed the recent changes. However, I'm not sure if the sox package really should be a hard dependency. It is definitely not necessary for the upp package, as the sources work just as well without it. Only the applications created with U++ actually depend on it, and even those do not break when it is not present. They merely stop beeping. So for now, I will add it to recommended dependencies in theide package.

By the way: I was looking at the sox package and noticed that it also provides library with C API. It should be possible to use the library directly, instead of calling the "play" in new process. It would be bit more work, but on the other hand, it could make a nice and universal sound package for U++. Probably much better than the one I created couple years ago using portaudio (which now rots in bazaar Smile ). If you're interested, nice example of playing sound with libsox can be found at github.