I have a long music mp3 file and want to cut out a part in the middle. I would like to create a smooth transition between the end of the first and the start of the second part, like a crossfade, and time it pricesely to keep both parts in sync.
I know how to do this from the command line with ffmpeg. But is there also a visual tool for macOs to do this manually, for more conveniently / visually timing the exact crossfade position?
Back in the old days I have used SoundForge on Windows. Is there something like that for macOs, preferably open source?