FabFilter User Forum
Emulating ProQ4 Solo mode with regular EQ moves
Forgot to ask the actual question: So how is this solo listen actually implemented? What kind of filters are being used to get that result?
David
— May 10, 2026
Soloing a band will basically just put a band pass filter around the center frequency of the band in the signal path. The band pass filter has a Q value 3x higher than that of the bell you're soloing, so if your bell has a Q of 1 a band pass with a Q of 3 will give you a similar result. It's not a 100% match, but it should get you pretty close.
Ralph (FabFilter)
— May 11, 2026
Oftentimes when I'm soloing a band I think "well that's a cool sound", however I can't seem to replicate that with regular EQ moves. I've played around with high and lowpass filters with different Q values and db/oct etc, band passes, etc. It always seems more congested and less transparent trying to do it manually. You can actually kinda fix the solo listen when you have it active and then do a left click inside the plugin gui and then just click outside the plugin, but that's hacky and I wouldn't count on it lasting through a save+reopen.