The Master Comp can be used for parallel compression by adjusting the mix knob. In his book, Bob Katz discusses parallel compression in mastering and recommends that the output of the parallel compressor be between -5dB and -15dB, relative to the non-compressed signal.

Instead of measuring the output of the parellel compressor relative to the non-compressed signal, the Master Comp takes a different approach. The amount contibuted by the parellel compressor is a percentage of the mix between the processed and unprocessed signals- and is controlled by the mix knob.

What percentage range on the mix knob corresponds to -5 to -15dB relative to the unprocesseed signal (assume the unprocessed signal to be 0dB)?