PGspy18 , Chrome loops just fine on my system. Can you post your capx to check if something else is at fault..?
-EDIT- I just confirmed that both Chrome and Firefox playback looped audio perfectly. IE 11 still leaves a small gap at the looping point.
Chrome Canary however, while playing the loop seamlessly, it does so with reduced audio quality, like it has been compressed at a very low bitrate. This is especially noticeable at higher frequencies, like those of the cymbals.