Why to record with real musicians?

People are asking how I do all the backing tracks of Fastfinger music. Hmmm. there are different ways how I like to work, depending on what kind of production were dealing with. But in this case I started by fooling around with Cubase sequencer software (with the idea of the song in my head firts). Used a lot of samples drums, percussion loops, laying down all sort of midi instruments to achieve the sounds and ideas roughtly. Record rough demo guitar tracks.