See http://news.ycombinator.com/item?id=1952356

google-translate-drums.js

(function() {
  // Notes from http://news.ycombinator.com/item?id=1952531
  var notes = {
    "suspended cymbal":"zk",
    "snare":"bschk",
    "brush":"pv",
    "bass":"bk",
    "flam1":"tk",
    "roll tap":"vk",
    "flam2":"kt",
    "flam tap":"kttp",
    "hi hat tap":"krp",
    "short roll":"pv",
    "better hi hat":"th",
    "instant rimshot":"thp, ds"
  };

  function writeNote(event) {
    song.value += event.target.note + " ";
  }
  
  function clear() {
    song.value = "";
  }

  function play() {
    var audio = new Audio("http://translate.google.com/translate_tts?q=" + encodeURI(song.value) + "&tl=de");
    audio.play();
  }
  
  function appendButton(attributes, container) {
    var button = document.createElement("input");
    button.type = "button";
    for (var name in attributes) {
      button[name] = attributes[name];
    }
    container.appendChild(button);
  }

  var container = document.createElement("div");
  var controls = document.createElement("div");
  var song = document.createElement("input");
  song.type = "text";
  song.size = 150;
  container.appendChild(song);
  container.appendChild(controls);
  document.body.appendChild(container);

  for (var name in notes) {
    if (notes.hasOwnProperty(name)) {
      appendButton({
        value: name,
        note: notes[name],
        onclick: writeNote
      }, controls);
    }
  }
  
  appendButton({
    value: "play",
    onclick: play
  }, controls);
})();

how-to.txt

Bookmarklet:

javascript:(function(){document.body.appendChild(document.createElement("script")).src="http://bit.ly/googlebeat"})()

Instructions:

1. Load Google Translate: http://translate.google.com

2. Load the bookmarklet in the above comment in the URL bar.

3. Click the new buttons at the bottom of the page.