Audio rate: 44100;

Ellipse ellipse2(200 Hz, 400 Hz, 20 secs);

Init:
    ellipse2.lock(left, 0.8, centre, centre);
    ...

Score 5 secs:
    At 0 secs for 0.5 msecs:
        ellipse2(0.3,0.2).applyForce(linear(30,0));
	...
    ...    