SinOsc s => Gain g => dac;

Phasor driver => CurveTable t => blackhole; // <------ connect to phasor

[0.0, 0.0, 0.0,

2.0, 1.0, 0.0,

3.0, 0.0] @=> float times[];

times => t.coefs;

s.freq()/100. => driver.freq; // <-- phasors freq

while (true)

{

     1::samp => now;

     t.last() => g.gain;

}