PauseSelf when triggered, pause enclosing synth

superclass: UGen

pause enclosing synth when input signal crosses from non-positive to positive

*kr(src)  src - input signal

//example

(

SynthDef("pauseSelf-help", { arg out, t_trig;

PauseSelf.kr(t_trig);

Out.ar(out, SinOsc.ar(400,0,0.2));

}).send(s);

)

s.sendMsg("/s_new", "pauseSelf-help", 1731);

s.sendMsg("/n_set", 1731, \t_trig, 1);

s.sendMsg("/n_run", 1731, 1);

s.sendMsg("/n_set", 1731, \t_trig, 1);

s.sendMsg("/n_free", 1731);