On Sat, 26 Sep 2009, PSPunch wrote:
Perhaps I should have made clear that I was not sure how [print~] and [samphold~] would even be considered to go under filters.
No, no, you were clear enough, I just meant that those aren't the only things that don't fit where they've been put, and that the problem is much bigger than that. (e.g. afaik, in Signal Theory, [rpole~] is not a "filter", though it still is peripherally related to filters; otoh there might be other Signal Theorists using different definitions or namings).
Is [samphold~] also often used in building filters?
I don't know... but it isn't "filtering" because what you can get out of it can have a richer spectrum than the original (left-inlet input), and it isn't "linear" either, or "quad", or whatever... it doesn't fit the filter theory much... and I don't see how using it anywhere inside an abstraction can not prevent the abstraction to be a linear filter or quad filter...!
According to my num.analysis book, [samphold~] would be called a "piecewise-constant interpolator", with the warning that "constant interpolator" is somewhat a contradiction of terms; and that you get to choose the pieces (using right-inlet). Whereas [adc~], for example, is also a piecewise-constant interpolator (in hardware or emulated), but all the pieces are identical in "width" (duration), that is, 1 sample.
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