example.js

var singer = require('./singer.js');

var ponDeFloor = singer.compileSong(require('./ponDeFloor.js'));

bot.on('newsong', function (data) {
  var song = data.room.metadata.current_song;
  
  // I forget how I detected songs, but once you've determined the song is Pon De Floor...
  singer.sing(bot, ponDeFloor);
});

ponDeFloor.js

module.exports = [
	{
		"time": 38,
		"text": "MAJOR LAZER"
	},
	{
		"time": 45,
		"text": "PON DE FLOOR"
	},
	{
		"time": 46,
		"duration": 29,
		"frequency": 7,
		"func": function (time) {
			// oooOOOOoooooOOOOoooo
			var out = '';
			for (var i = 0, l = 3 + Math.round(Math.random() * 5); i < l; i++) {
				out += Array(2 + Math.floor(Math.random() * 6)).join('O');
				out += Array(2 + Math.floor(Math.random() * 6)).join('o');
			}
			return out;
		}
	},
	{
		"time": 77,
		"duration": 10,
		"frequency": 5,
		"text": "BABY GET IN LINE, LET ME SEE YOUR BESTEST WINES"
	},
	{
		"time": 90,
		"duration": 10,
		"frequency": 5,
		"text": "PON DE FLOOR, ANYWAY"
	},
	{
		"time": 106,
		"duration": 44,
		"frequency": 7,
		"func": function (time) {
			// oooOOOOoooooOOOOoooo
			var out = '';
			for (var i = 0, l = 3 + Math.round(Math.random() * 5); i < l; i++) {
				out += Array(2 + Math.floor(Math.random() * 6)).join('O');
				out += Array(2 + Math.floor(Math.random() * 6)).join('o');
			}
			return out;
		}
	},
	{
		"time": 159,
		"text": "MAJOR LAZER"
	},
	{
		"time": 160,
		"duration": 10,
		"frequency": 5,
		"text": "BABY GET IN LINE, LET ME SEE YOUR BESTEST WINES"
	},
	{
		"time": 175,
		"duration": 47,
		"frequency": 7,
		"func": function (time) {
			// oooOOOOoooooOOOOoooo
			var out = '';
			for (var i = 0, l = 3 + Math.round(Math.random() * 5); i < l; i++) {
				out += Array(2 + Math.floor(Math.random() * 6)).join('O');
				out += Array(2 + Math.floor(Math.random() * 6)).join('o');
			}
			return out;
		}
	},
	{
		"time": 199,
		"text": "BEEP BEEP BEEP BEEP"
	}
];

singer.js

var compileSong = function (lines) {
  var trigs = {};
	var addTrig = function (time, line) {
		if (!line.func && line.text) {
			line.func = function () {
				return line.text;
			};
		}
		trigs[time] = line.func;
	};
	for (var i = 0, l = lines.length; i < l; i++) {
		var line = lines[i];
 
		if (line.duration && line.frequency) {
			addTrig(line.time, line);
 
			var t = line.time + line.frequency;
			var end = line.time + line.duration;
			while (t <= end) {
				addTrig(t, line);
				t += line.frequency;
			}
		} else {
			addTrig(line.time, line);
		}
	}
	return trigs;
};
 
var sing = function sing (bot, song) {
	var i = 0;
	setInterval(function () {
		i++;
		if (song[i]) {
			bot.speak(song[i]());
		}
	}, 1000);
};
 
module.exports.compileSong = compileSong;
module.exports.sing = sing;