Believe it or not some people who write that music don't know how to play a keyboard. Their rigs will consist of high quality samplers such as Akai's, and they'll some extensive computer software as well.

Some of the artists who don't know how to play a keyboard or sequence on the keyboard have basic "notation" knowledge and are able to step record tracks such as piano parts and so forth.

There's also those artists who work soley with samples, they mix them up, slice them here slice them there, stretch them... So much you can do there.

Squeak