ref: a901d5647d30cf20fc0a096a612c58b2f99b8551 dir: /util/faust/triangle.dsp/
import("oscillator.lib"); freq = hslider("[0]freq", 440, 0, 20000, 0.0001); amp = hslider("[1]amp", 1, 0, 1, 0.00001); process = triangle(freq) * amp;