I'm glad I'm not the only one who just recently discovered this, I thought this was some well known secret
I really wish that we could get our hands on the original samples & project files that valve had, then we could have a properly slowed down Dark Energy, instead of slowing down the mp3 (which makes it sound poor in comparison to normal Pulse Phase because slowing a mp3 by 50% is the same as halving the sample rate)