The first function is specific to my Monocle-based app. But the second one is arguably useful, despite the name. It creates an AudioBuffer of the smallest viable mp3 (per http://www.hydrogenaudio.org/forums//lofiversion/index.php/t26315.html) and plays it immediately. You would invoke this from a click or touch event to "unlock" the AudioContext…

gistfile1.js

function panderToMobileSafari() {
  if (!Monocle.Browser.is.MobileSafari || p.pandered) { return; }
  oneHandClapping(p.context);
  p.pandered = true;
  debug('Pandered to MobileSafari.');
}


function oneHandClapping(audioCtx) {
  var arr = [
    0xFF,0xF3,0x14,0xC4,0x00,0x00,0x00,0x03,0x48,0x01,0x40,0x00,
    0x00,0x4C,0x41,0x4D,0x45,0x33,0x2E,0x39,0x36,0x2E,0x31,0x55,
    0xFF,0xF3,0x14,0xC4,0x0B,0x00,0x00,0x03,0x48,0x01,0x80,0x00,
    0x00,0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55
  ];
  var buf = new ArrayBuffer(arr.length);
  var bytes = new Uint8Array(buf);
  for (var i = 0, ii = arr.length; i < ii; ++i) { bytes[i] = arr[i]; }
  audioCtx.createBuffer(buf, false);
  var snd = audioCtx.createBufferSource();
  snd.connect(audioCtx.destination);
  snd.start(0);
}