// Ctk intro
(
// create a prototype object from the SynthDef parameters
a = CtkNoteObject.new(
	SynthDef.new(\osc_2b, {arg freq = 440.0, dur = 1.0, attackdur = 0.01, releasedur = 0.01, amp = 1;
		var osc, env;
		env = EnvGen.kr(
			Env([0, 1, 1, 0], [attackdur, dur - attackdur - releasedur, releasedur], \lin),
			levelScale: amp, doneAction: 2);
		osc = SinOsc.ar(freq, 0, env);
		Out.ar(0, osc);
		})
	);
)

// look at the arguments (slots) of the object
a.args;

// create a new instance of the object
b = a.new;

// look at its slots
b.args;

// change a slot value
b.freq_(880);

// access that slot
b.freq;

// change more than one slot in one shot
b.dur_(3).amp_(0.7).releasedur_(0.2);

// look at the slot values
b.args;

// now play it
b.play;