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:
I want to point out that the sample that streams on the website has a small static noise in it.. the original, when downloaded, will not have this noise. I made 2 versions of this one, the one I kept for myself scares me more than this one, lol, but this one has more stuff going on in it.