If you own an external USB MIDI controller (keyboard) or plan to buy one, you may be interested in how these things work with Ubuntu. Usually they are shipped with a CD that contains a Windows/Mac drivers & some music-making applications. Therefore it is common to see a note on their box that one needs Windows/Mac to use the instrument. No doubt this may discourage Ubuntu users from buying such controller, but is Linux really a not supported platform?
And, by the way, how to setup a working set of music applications, that will allow one to compose & perform music (regardless of whether you have an external keyboard or not)?