What is the best (free) MP3 file splitter software?

I use my Comag SL 40 digital satellite receiver to make recordings stored on a large USB stick. In Europe we also have satellite radio, but my receiver only stores video files. Now I have found a way to convert the video files to MP3 files using VLC. I prefer recording for at least an hour and then want to cut out everything in the MP3 file I don’t like. There are numerous MP3 tools that allow doing this and I’m not sure which one to use. Many get poor rating on websites like download.cnet.com

Any experience you can share with me?