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:
""Holy shit, it's an ambush!"" Originally recorded for a scene in a Starship Troopers Half-Life map that was never released. These are supposed to be soldiers talking to eachother after first landing on the surface of the bug planet. The voice actor is myself (Josh Polito).