I've been messing around with the dynamic compressor in GarageBand '09. I understand the theory behind all the sliders (threshold, ratio, response time, gain). However, it seems they are missing a critical piece here: visual analysis of the signal. If I can't see the dB curve, how do I know where to set the threshold? I've been able to get by with just my ears, but I'd like some kind of visual confirmation that tells me it's doing what I think it's doing. Incidentally, what I'm working on is a solo violin w/ piano accompaniment recording. The violin has a huge dynamic range, and I find I want to crank the gain in order to hear the quite parts better against the piano, but want to use the compressor to keep the loud parts from getting too loud because they start to sound "screechy" to me. So... Does anyone know how to tease some kind of visual analysis of the signal level out of Garageband? I suppose I could go by the VU meters in the track display. I could also use the waveform editor, but the Y axis appears to be unitless. Or..... Am I just hitting up against one of the (many) limitations of GarageBand and I should take this as a hint that it's time to upgrade to something more high-end?