Beginner question: When a filter is all the way open, is it affecting the sound?

[SynthWizard]

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Beginner question: When a filter is all the way open, is it affecting the sound?

I was browsing gearslutz and someone mentioned that they do not like the "open Curtis sound". Now they might be referring to the sound produced when the filter is mostly (but not all the way) open but that made me wonder if what I had always assumed to be true is really true: that when the filter is 100% open (and the filter env is not negative), we are hearing the VCO(s) as if the synth did not have a filter (a bypass).

When the filter is wide open it's letting through the whole spectrum of frequencies, but is it still "etching" or effecting the shape of that sound in any way?

I figure it's either analogous to a normal, water hose being open or closed. When a garden hose is all the way open, you just get a unfettered stream of water.

Or is it like a showerhead? When it's all the way open it sprays out the water in a distinct pattern.

submitted by /u/gizzardgullet
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