i do i know

[BETAMAX-UK]

do i have to play the full song to put it in my new file ive only just bought keyrite.But theres nothing to say key change made successfully how do i know if i have changed the key to my song? this is what ive been doing (1) selected the track it goes in the select file no prob there.(2) i create a file for select output file and press write. then i press play file (i hear the track) i wait for it to finish then press stop. does that sound right thanks