Firmware 13.2.0 - DOS 2.2.6 for Expert Pro - Release note

[Soniclife]

Not all equalisers use the same formulae and Roon and Sweet Room are different.

For example

Roon
For the Peaking filters the bandwidth in Hz between the half gain points is given by:

Bandwidth = centre frequency/Q

100hz  6db  Q=7.079


Sweet Room
For the Peaking filters the bandwidth in Hz between the half gain points is given by:

Bandwidth = sqrt(gain)*centre frequency/Q

100hz  6db  Q=10


As you can see, the Q values are different in generating the same filter shape.

You can convert Roon filters to Sweet Room filters by using REW.
Within REW, select EQ tab, choose the 'Generic' equaliser for Roon, enter the filter values then change the equaliser to 'Rephase'.

Is this documented somewhere?  If it's not how did you work this out?

I hadn't realised any of this when I made a correction this weekend, which sounds very good right now, but I used the DCX2496 setting, which limits to 9 filters, and it also matches the rephase Q values, so it looks like I got lucky.