It can be used by another program directly though--it has a command-line interface (decibel-audio-player-remote) that can do remote control, and it can output information about its current status to a text file. (It's not as good as most Unix programs, but it's a lot better than nothing.)<p>It's not command-line only like most Unix programs, and it's certainly not as simple as most Unix programs, but I do think it does incorporate some of the tenets of Unix philosophy (most importantly: doing one thing and doing it well).<p>I realize that there's other music playing software that may conform to Unix philosophy more rigidly, but in my experience good back-ends don't necessarily translate to good GUIs, and a GUI is what I want for my media player. I think Decibel is a good compromise.