Gary, this is odd.
I have a my own website which opens playing music. It was working fine up until about 2 weeks ago. When the site opens the music is off. Sounds like a beat was chopped off and the rest of the music is off.
My son has a PC and a Mac and when he goes to my website the music plays fine on both computers. I was at his house and heard it.
I called my friend who created my site and it works fine from his computer. I called Godaddy and they said everything is fine on their end. I called Comcast and they said the same thing.
Could the problem be with my iMac? And if so, what could it be?