#1
I have to GP5 files of the same song however 1 song is played at 70bpm and the other is 140bpm. How can I make the 140bpm file play at 70 but sound normal? Is there a way to half the note durations?
#2
nope, you just have to change each one individually

and out of curiosity, why does it matter?
since 70 and 140 are essentially the same thing
#3
Oh well some parts are played kind of differently, one version just sounds better. Am trying to pick bits from both to create a better sound/easier to play version.
#4
Actually Ive heard theres a way to make a certain part of the song play at a different tempo in GP5. Anyone know how to do this?
#5
Yeah I think you can half the note duration by selecting all the notes (Ctrl+A I guess) and then click on the minus (or plus, i forgot) symbol of your numpad.

However measures shouldn't be complete now, so you'll have some work to make them fit. maybe change the score signature from 4/4 to 2/4 for instance ...