To get around this annoyance, I've converted the original midi files that were on the site into mp3. They play with the the audio tag instead of the old embed tag. Not quite all of them have been converted but to start:
- Sonic 1
- Sonic 2
- Sonic 3 & K
- Sonic CD
- Knuckles' Chaotix
- Sonic 3D Blast (Saturn and MD/Genesis)
- Sonic Adventure
- Sonic Adventure 2
There's about 450+ across those games listed. You'll find 3 options where it shows “Results” to choose which files are shown. By default it lists the normal game tracks.
Enjoy!