hey thanks 
(
{
var width = 0.25;
var freq = 400;
var phasor = LFSaw.ar(freq/2).range(width.neg, 1-width);
phasor = phasor.bilin(0, width.neg, 1-width, 0, -1, 1).abs*2-1;
[phasor]
}.plot
)
this gives control over the tilt, yes!
in the paper its also folded, do you have an idea how to adjust the code?
in the paper it looks like this:
2.) many thanks. i will have a look