Muff's Modules & More

[jjc]

I'm guessing VSF stands for 'voltage sensitive filter,' but don't know for sure. Whatever it stands for, does a VSF differ from a voltage controlled filter, or is it just a matter of semantics?

[chinard]

maybe "Variable State Filter"?

(some context might help.. where exactly are you seeing the reference to VSF?)

[rafe127]

^ I agree.

VSF (I have heard it called SVF - state variable filter) is just a VCF that includes different modes, like high pass, low pass, band pass, all in one module.

As opposed to to a module (or pedal, or whatever) that has only one state available (i.e. only low pass).

eg:

http://synthesizers.com/q107.html

[rafe127]

Although it could be something else entirely

[cornutt]

I see the term "state variable filter" used mostly for filters where the response is continuously adjustable from lowpass through bandpass and highpass.

[neandrewthal]

Very Sexy Female

[johnnymad]

[jjc]

Variable state filter makes so much more sense. Thanks!

[urbanscallywag]

the state variable filter is named after the math behind it, which is why it does(n't) make sense. depending on your perspective, of course.

[Hi5]

you do normally say state variable filter so this is probably from a serge filter being a variable slope filter.

[Hi5]

what is the context that the VSF term came up in?

[THM]

Vintage Synth Forum ?

(V...S...F...)

[ndkent]

Sounds like someone is making up their own abbreviations despite svf being used occasionally.

Also there are very if any genuine continuously adjustable filters. Designs out there do that, but generally via mixing and inverting multiple responses.