Cutting the song down

Our song was originally 4:58 so we intended to cut it down. We also thought that starting it a little later would work well because the instrumental at the start was really long. We cut the instumental and instead we have started the song at 0.18 seconds instead of 0.00 because it works better. We originally thought we should finish the song at 3:52 but we realised that would be too long so we changed the timing so it now finishes at 3:25 so now the song is cut down from 4 minutes 58 seconds to 3 minutes 7 seconds which means that there will be less shots.