Audio Compression

Here's a great little post over on Horndog Blog covering what's going on with compression, which is used so frequently in audio we hear these days. There's an embedded video with aural and visual examples. 

When Stewart Weaver did a demo mastering job on my "Slow Music" CD, he did the opposite of compression to the keyboard sound, making the softs softer and the louds louder. I knew he'd done something that really changed the sound of the CD for the better, but until he told me he'd used some decompression, or expansion, I couldn't tell how he'd done it.