REW is able to create modal equalizers in Generic equalizer type. These are the only type of filters known to deal properly with the room modes. It would be nice to be able to import to Roon or even enter manually such filters created in REW.
Modal filters are normal parametric EQ filters whose Q or bandwidth is adjusted by REW as their gain is changed to ensure they target the specified T60 value as closely as the equaliser settings resolution permits.
The Modal filter type is a peaking filter whose bandwidth or Q is adjusted by REW to match a Target T60 time, it is used to accurately counter a modal resonance whose T60 time is known. To match a specific T60 time the filter’s bandwidth or Q must be altered as its gain or centre frequency change. REW chooses the bandwidth or Q setting supported by the selected equaliser that most closely matches the target T60.
Is this not already possible (59.8 / -13.0 / 7.1 for the example from the manual)?
Actually you are right. These two filters made exactly the same change on the target curve.
Thanks a lot.