I was checking the sound of some of my 12-string tunes on the car stereo; the soft notes were getting lost in the car noise. I wish car stereos had built in compressors. A compressor pumps up the quiet parts. Sometimes you can hear a really aggressive compressor on a radio announcer's voice; the background noise "pumps up" between each phrase. I usually can't hear compression when it's done right - the music seems to sound the same, but I can hear every note, even while driving.
Sometimes compression is done for a musical effect, and
