I want to build an octave down effect in max msp, one which produces a pulse
wave for every 4 zero-crossings. (omitting DC) any audio wave will cross
zero two times, so in two periods it crosses 4 times. So the problem boils
down to counting zero crossings at sample-perfect timing.
my guess is that it will have something to do with +=~ feeding sah~ or
count~ or something, but i can't figure it out.
of course it's fairly trivial to simply pitch down any input by half, there
are very many ways of doing it, but this particular way interests me b/c it