Note blocks, read commit desc, probably incomplete

Right now, they only play * waves (using Web Audio API)

* frequency: frequency in Hz
* type: "sine", "square", "triangle", "sawtooth"
* end: "linear" for linear fade over length, "exponential" for exponential fade over length, anything else for the wave to stop abruptly after length (fades start immediately)
* length: duration of the sound

mods/note_block.js

@@ -0,0 +1,89 @@
+audioContext = new AudioContext()
+
+//Derived from marcgg's music.js
+
+oscillatorDefaults = {
+	frequency: 440,
+	type: "sine",
+	endType: "none",
+	length: 1
+};
+
+audioObject = {};
+
+function oscillator(name="test",parameterObject=oscillatorDefaults){ //creates oscillator with gain node, has specifiable frequency and type, fades out over 1 second (hard-coded)
+	var defaultKeys = Object.keys(oscillatorDefaults); //readability variable
+	
+	for(i = 0; i < defaultKeys.length; i++) {
+		var key = defaultKeys[i]; //the indexed keyname
+		if(typeof(parameterObject[key]) === "undefined") {
+			parameterObject[key] = oscillatorDefaults[key];
+		};
+	};
+	
+	var oscillatorNodeName = `${name}Oscillator`;
+	var gainNodeName = `${name}Gain`;
+
+	audioObject[oscillatorNodeName] = audioContext.createOscillator()
+	audioObject[gainNodeName] = audioContext.createGain()
+	audioObject[oscillatorNodeName].type = parameterObject.type
+	audioObject[oscillatorNodeName].connect(audioObject[gainNodeName])
+	audioObject[oscillatorNodeName].frequency.value = parameterObject.frequency
+	audioObject[gainNodeName].connect(audioContext.destination)
+	audioObject[oscillatorNodeName].start(0)
+
+	//stopping handler
+	if(parameterObject.endType === "exponential") { //starts fading immediately
+		audioObject[gainNodeName].gain.exponentialRampToValueAtTime(
+			0.00001, audioContext.currentTime + parameterObject.length
+		);
+	} else if(parameterObject.endType === "linear") { //starts fading immediately
+		audioObject[gainNodeName].gain.linearRampToValueAtTime(
+			0.00001, audioContext.currentTime + parameterObject.length
+		);	
+	} else { //waits to stop
+		audioObject[oscillatorNodeName].stop(audioContext.currentTime + parameterObject.length);
+	};
+};
+
+elements.note_block = {
+	color: "#ee33ee",
+	behavior: behaviors.WALL,
+	state: "liquid",
+	category: "liquids",
+	density: 1200,
+	hardness: 1,
+	conduct: 1,
+	properties: {
+		frequency: 440,
+		type: "sine",
+		endType: "none",
+		length: 1,
+		debounce: 0,
+		debounceLength: tps,
+	},
+	tick: function(pixel) {
+		var pixelSoundName = `x${pixel.x}y${pixel.y}`; //Generate unique-enough name
+		
+		var pixelPropertyObject = { //Load sound properties from pixel as object;
+			frequency: pixel.frequency,
+			type: pixel.type,
+			endType: pixel.endType,
+			length: pixel.length,
+		};
+		
+		//console.log(pixelPropertyObject);
+		
+		if(pixel.debounce < 1) {
+			//console.log(`${pixel.debounce} not debounced, play`);
+			if(pixel.charge) {
+				oscillator(pixelSoundName,pixelPropertyObject);
+				delete pixel.charge;
+				pixel.debounce = pixel.debounceLength;
+			};
+		} else if(pixel.debounce > 0) {
+			//console.log(`${pixel.debounce} debounced, don't play`);
+			pixel.debounce--;
+		};
+	},
+};