I've got back into doing radio shows recently and one of them is a weekly pre-recorded show. At the moment the way I'm recording it is by copying and pasting my tracks (MP3 or M4A files) into GarageBand and adjusting the volume of each track accordingly. However, a really serious problem I'm having is I can't fade down music for a few seconds while I talk, and then fade it back up.
For example, if a track has a 20 second intro and I wanted to speak while the intro is playing, I cannot figure out how to select just the first 20 seconds of that track, fade it down so I can be heard over it, and then bring it back up again for the rest of the song. This issue also means I can't use beds as I'm talking, which I'd like to do as it sounds much better with them in my opinion.
I have tried everything I can think of on the latest GarageBand for Mac, and I also played around with Audacity to see if it would do this but have had no joy with either. Could someone give me any idea of how to do this either with GarageBand or any other VO accessible, and preferably free, audio editing software?
Thanks in advance.