Topic: The Low Shelf Character, Slope and Resonance

Hello,

I measured the room resonance today, and I'm maintaining room calibration.
Then I found the Low Shelf's Resonance Curve is very huge on high Q.
So I'd like to know the Slope and the Resonance Curve of the Low Shelf Character.

Does anyone know the Slope (db/oct) and Resonance Character (analysed frequency response)?
I think this curve is similar to the original Low Shelf of DMG Equilibrium (frequency position is different).

Or please tell me the software which can analyse and record the frequency curve from ASIO IOs.

Thank you.

UFX, XTC, BabyPro, Baby, UCX, QuadII, M16&32ADDA, HDSP(e) MADI AIO 9632 Multiface2
Win10, BigSur