Can't hear sound effects

I'm using Chrome and re-installed Adobe Flash and followed the directions to try and enable Flash or Shockwave Flash but didn't see any plug-in for that after clicking "details".  

Can you explain what you mean by "sound effects"? Are you referring to the jukebox? If so then follow the instructions on our  audio_visual troubleshooting guide . Or are you referring to the built in voice chat aspect of roll20? That is feature is inactive unless there is two or more people in the chat unless the GM has it disabled.

I was referring to the jukebox.  Are you saying I can't hear laser fire or ambient cave water because of cached browser cookies?  I don't intent to use the microphone or do any talking for the first few trials of roll 20.  I just want to hear a few seconds of jukebox tracks.

No I'm not saying that. I'm just getting everything set to the same page. If you have ran through the audio_video troubleshoooting guide and retried listening to a  jukebox track but had no luck, now we move to the next step. Can you please follow Steps 1-3 of our Solving Technical Issues wiki page (you can skip step 3 since you already did it), taking special care to temporarily disable all browser add-ons and extensions, temporarily pause your anti-virus, and try switching browsers (for Chrome/Firefox specific issues) to see if one of those components is causing the problem. If all of that fails, please follow Step 4 , including providing all of the necessary information, so that we can further assist you. This is about gathering all the needed information to assist you.