Glad to help! I was having the same issue last time. If you download TT Superbike from MyAbandonware, you should receive the game files in ccd, img, and sub formats. Although PCem can run ccd, it may not run properly, as you experienced with no music. Therefore, you will need to convert the ccd to cue/bin format. I recommend using CDmage because it's free and easy to use. Once the conversion process is complete, you can mount it on your PCem, and it should resolve your problem.
