Anything that is altered even slightly on a rhythm then makes that style or rythm the property of the person that alters it so by miissing out 1 beat of a bass and using a
different drum kit that style is then yours.
When we buy these machines we also buy the tools and the right to use them as we want so I cannot see why a drum pattern or a bass riff is worth copywriting. Well thats what I think anyway.