FabFilter User Forum

Different pre/post curves with flat EQ in Pro-Q

Hi, I've been demoing Pro-Q in the past days. In Mid/Side configuration, with Pre+Post analyzer and zero latency, the Pre and Post spectra are not the same even if a flat EQ - with no inserted EQ points at all - is present. Have a look at the screen shot here:
dl.dropbox.com/u/22217600/ProQ.png

What's going on? Thank you for your help.

Enrico — Oct 10, 2012

Hi Enrico,

Thanks for reporting this issue! I've look into it, and it's a visual analyzer bug only (doesn't affect the sound). We'll fix this in a future update!

Thanks,

Floris (FabFIlter) — Oct 10, 2012

Great! As for now, which of the two spectra is the most faithful one? The all solid or the semi transparent one? And what does it represent, Pre or Post?

Cheers,
Enrico

Enrico — Oct 10, 2012

The solid spectrum is the Post signal, the transparent one the Pre signal.

Normally the analyzer displays the maximum of the left and right channels. In M/S mode, the Pre spectrum incorrectly displays the maximum of the mid and side channels, which is different from the left/right maximum shown by the Post spectrum. So the Post spectrum is correct.

Cheers,

Frederik (FabFilter) — Oct 11, 2012

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