Dennis, While C4's interface was familiar, I don't think other software companies can simply copy the interface. There's gotta be some patents involved. The middle graph of the multipressor seems very useless and can be simply ignored. ( correct me someone if I am wrong ) It took me a couple days, but by doing what I stated above you can multiband compress a well mixed source material and get some great results! I am totally lost with the downard expander, and how it would help on a master bus. Thanks for your reply, Jeff