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:
Me shouting "FALCON PUNCH!!!"My first upload. I only shouted the words, I didn't actually do a punch, because we all know that only one man is capable of the Falcon Punch!