Audio progress bar not working in Chrome

Hello, there,

On a wordpress site page that I'm working on:
http://drmatthersh.com/audio-download-page-test/

When using Chrome as browser, when you click to play the audio, the progress bar doesn't respond.

I've tried handful of other audio WP plugins and still having the similar problem in Chrome. (Currently with version Version 34.0.1847.131 m.)

I couldn't figure out what is causing the issue.

Thanks for your attention and support!

George