On GotSound.org we are using wavesurfer.js to play sounds in a browser.
It's works only in modern browsers supporting Web Audio.
MediaElement fallback to support old browsers like Internet Explorer not always works.
You can find more information about browser supported Web Audio API here.
Please, consider to upgrade your browes to one of the following:
Feel free to chop out the bits you need I found this was great for an intro or approach for a bigger song, There are a few mistakes and overlapping but it is editable and choppable. :) This was created from scratch by myself using psycle software and a big thanks to their team. REF: psycle.pastnotecut.org - recorded and developed 8th 9th december.