Is still a bit of a mystery to me. I had created a screencast in pieces using a cheap microphone that creates a baseline silence that is anything but. My first thought was to cross-fade the 'silences' to smooth the transition from one cut to the next, but I was getting volume dips in the middle of the audio dissolves.

I downloaded some pink noise from freesound.org and tried some tests.
- Overlaps with fades gave me me volume drops in the transition.
- Overlaps without fades gave me volume jumps in the transition.
- A simple end-to-end butt splice sounded seamless. No pop, even.
So for screencasting, that's good enough for me.
