There is plenty of debate on whether music is a language. But there is no debate that this friggin' piano is talking!
Actually, there was debate about this on the Auditory e-list, which prompted this article on sine-wave speech and this raw demo. Want to try it yourself? Here is a program that will convert any WAV file to a MIDI file, so go ahead and record yourself saying something, then convert it to a MIDI file to be played back with the sampled instrument of your choice.