Audio files created using Fruity Loops 7 were very big. Anyways to fix that?

I created a beat (using four patterns) that was about 3:30 mins long. However, the audio file was about 35 MBs. This size seems very abnormal. The average song from a CD or something is usually about 4-6 MBs. Is there a way to make audio files not as large (without cutting the length of the beat or the patterns)? Thank you!