Restore EQ scaling for RGB and HSV waveforms.

[daschuer]

This fixes #15788 a LOW-Kill action, with the new unscaled shadow:

Here you see a waveform with killed low end and Tango

[ronso0]

I can confirm this restores the previous behavior for the RGB renderer.

But why is the unscaled background wave now painted with the axis color? This does not make any sense to me, all band's 'shadows' look grey now.

Please restore the look from before #15324 where we can identify each unscaled band by color.

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I didn't check the HSV renderer, yet, as I didn't ever use it and am not quite sure about the use case / expectations.

[daschuer]

You mean the RGB type, right? I will restore dimned version if the original waveform there.

[daschuer]

Now RGB High Details type looks like this: (Top: low kill)

[ronso0]

Thanks, but not quite there, yet. This branch

And main my main-based branch. Alpha was 0.4 before. Slightly more opacity makes a difference when the waveforms are moving, and at night..

[daschuer]

OK changed to 40% Opacity.

[ronso0]

Thank you!
I'll need to do some prep in order to compare this and the state before #15324, which I hopefully manage to do next days.

[ronso0]

will test this evening!

[ronso0]

Thank you for this fixup!
Waves look like before now

[ronso0]

Though there seems to be another change (regression IMO) with the preroll triangles.
Left is before #15324 ( I revert the commits from that PR on 2.5), right is 2.5/this PR
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Where are those rendered?