You'll see a thick white line that shows the difference and the Match button will automatically Once a valid input and reference spectum have been analyzed or selected, (normally this doesn't take more than 30 seconds), you'll notice that the detected average spectrum When you're analyzing input or reference audio, the spectrum averages over time, so after a while If you haven't selected an external spectrum in advance, the side chain input will shown as an option here. Once it has gathered enough information, the Match button will become enabledĪnd you're ready to proceed. The plug-in will then analyze both original and reference spectrums at If you have selected an external spectrum in the analyzer panel (which can be the external side-chain input, or the post-EQ spectum of another Pro-Q 3 instance), you can select to use this as the reference spectrum as well.