clintmartin
I love DC8C, but to be honest Pro-C taught me how to use a compressor.
This is a great point! The visuals are definitely a nice aid.
The thing is, your audio is generally not going to be at max volume, peaking at 0 dB. Therefore, any compressor will need to be adjusted specifically for the audio. A compressor with a threshold of -5 dB and ratio of 2:1 is not going to have the same affect on one audio track as another, just due to the differences in their volume.
And that's where FabFilter's compressor is handy--its waveform visualization makes it very easy to identify where the threshold is relative to the actual audio peaks, and how your compressor is affecting them. Of course, adjusting the compressor to sound the best is what ultimately matters, but it's useful to be able to see what the compressor is doing, too!