Originally posted by hitman:
Remember, Keyboards are just bunch of plastic and metal neatly integrated to process audio data! Nothing MORE!
I thought they made coffee and woke you up in the morning too.

Seriously, they also process midi data which, in the end, produces sound through the outputs. Other audio data (excluding the ROM) would be if the keyboard had the ability to load, record, and/or play, audio samples i.e. .wav, .mp3, Akai, etc. But you're right, they're main purpose is to produce "sound" which is what I think you meant.
Best,
Mike