Super useful tool in learning timbre: https://learningsynths.ableton.com/en/get-started

• Tone.Oscillator

let osc = new Tone.Oscillator(440,"sine").toDestination();

• Tone.AmplitudeEnvelope

var ampEnv = new Tone.AmplitudeEnvelope({
	"attack": 0.1,
	"decay": 0.2,
	"sustain": 1.0,
	"release": 0.8
})
//create an oscillator and connect it
var osc = new Tone.Oscillator().connect(ampEnv).toDestination();
osc.triggerAttack();

• Tone.Sampler

var sampler = new Tone.Sampler({
	"C3" : "path/to/C3.mp3",
	"A3" : "path/to/A3.mp3" //the more reference soundtrack provided, the more accurate
}, function(){
	//sampler will repitch the closest sample
	sampler.triggerAttack("D3")
})

• Tone.Filter

let aFilter = new Tone.Filter(200, "highpass");
aFilter.toDestiniation();
osc.connect(ampEnv);
ampEnv.connect(aFilter);

• function keyPressed when using p5 event handler like this, both function draw/setup need to be included in the code for it to function.