FAUST Buffer Freeze smooth fade

[treynterrio]

Hi there,

I created a freeze effect that loops the buffer of the incoming audio signal in FAUST, but I haven't found a proper solution to achieve smooth fades at the beginning and end of the buffer loop. I tried attack-release-envelope-like things, but that didn't get rid of the clicking. Does anyone have an idea how I can do this?

Here is the code:

import("stdfaust.lib");

size = 192000; 
index = ba.period(size);

input(x) =  +(x * (1 - r)) ~ 
            (de.delay(size - 1, size - 1) * r);

r = checkbox("Freeze Buffer");

process(x1, x2) = input(x1), input(x2);