If anyone has done work with patches that incorporate linear piecewise functions, do you mind if I have a look?

I'm about to delve into this in order to realize some Phase Distortion patches. However, remapping 0 to 1 values with functions via expr isn't terribly intuitive for me. I'll get my head around it after spending some time, but I took statistics instead of trigonometry. I regret that now.

thanks

I create piecewise functions by feeding an [until] counter into [expr], and use nested if/then/else structures... which is not a possibility explicitly outlined in the extant literature for [expr] so I had to just try this on a whim!

It works, and you can make the whole thing as complicated and messy-looking as you like. Visually, it is a pain in the toosh, ends up looking like LISP with parentheses everywhere... I think it's helpful to write out complicated things in a text editor with carriage returns, then copy/paste into [expr] when you're done.

I've attached an example which I used to create a simple linear amplitude envelope for a sample of arbitrary size. Feed it a big number and look at the table to see a trapezoid!

I hope this is helpful.

http://www.pdpatchrepo.info/hurleur/piecewise-ex.pd

yeah, that's more or less how I've been working with it.

here's a simple knee generator

http://www.pdpatchrepo.info/hurleur/lxi_piecewise_50knee.pd

Are you asking about wave-shaping? You can download/buy Miller Puckette's book and there is a section about that. See it here: http://crca.ucsd.edu/~msp/techniques/latest/book-html/node78.html

I've read that section, in fact.

It seems the Puckette examples are largely concerned with predictable spectra. I, on the other hand deal mostly in geometrics.

haha. that's bs.

I actually have a really hard time understanding and applying the mathematics.

Attached is what I need piecewise for. So far, I'm happy with this solution.
variable even harmonic control. Classic saw shape from sine

http://www.pdpatchrepo.info/hurleur/lxi_phasedistortion_saw.pd