Check this clip from London Boulevard.
The music was done on an iPad 2 using GarageBand:
Thing is, that’s not the original clip nor the original sound.
I did a remix.
Original London Boulevard clip:
Original GarageBand clip:
But had my video been cleaner, had the sound effects (engine sound, etc) been in there, had the editing been better, would you really have been able to tell the music didn’t go with that movie?
I don’t think so.
So, in some cases, an iPad 2 is all someone is going to need to create a hell of a score for a movie.
(Of course, no one should actually do that as shown here with the Apple loops. I believe the license for them is for non-commercial use only.)