Radio Advert Backing Track

After coming up with a script I then looked at the backing track and tried to tie it in with the adverts, I have used both backing tracks from the Adverts in the two opening sections of the Radio advert, After looking over it on I movie it became apparent I would have to adjust the backing music as they both have running up silences which takes to long and the effect that I want to achieve has not been achieved, so to fix this I will place both tracks into garage band, editing the beginnings of the songs so that they fit in with the radio advert and the text (Which will be a voice over when recorded). The voice over will be a male voice deep in down and pitch with good diction so that it is easily understood and doesn't  section of any of my audience.