This started as a simple task. I wanted to convert some cassette tapes into MP3 files. I have a shiny new iMac that I thought would be perfect for the task. Then I ran into lots of problems.
I used GarageBand to record the audio. I thought I could simply save it as an MP3 file but that would be too simple, wouldn't it? GarageBand only creates AAC encoded audio in M4A files. Unbelievable! Eventually I got a solution.