
Sharon R. answered 01/30/20
Bachelors in Contemporary Writing & Production
There's no 'correct' way to compose. Some people prefer to have what they hear in their head come on to paper without being influenced by the outside world - even if includes themselves on an instrument or a notation software. Other's, myself included, prefer to be able to hear our idea because sometimes it doesn't manifest 100% in our head the way it would if we played it.
This is simply a question of 'what approach works for you as a composer'. By all means, neither method is wrong. :)