RedDirection detects inc/dec of a signal
outputs 1 if previous sample was less than current
outputs -1 if previous sample was more than current
else outputs 0 - i.e. when no change
*ar(in)
*kr(in)
in - signal to track
*new(start)
direction(val)
<>last
//--
s.boot;
a= {SinOsc.ar(RedDirection.kr(MouseX.kr).poll*100+400, 0, 0.1)}.play
a.free
//--
a= RedDirection(10)
a.direction(9)
a.direction(10)
a.direction(10)
a.direction(50)