I had a Sound Blaster card with a sound enhancement feature that made CD audio sound a lot better, but I can't remember what it was called or what it actually did.

I've tried to figure it out to see if there are any modern equivalents, but I haven't been able to identify the feature. All I remember is that it was a single checkbox in the Windows driver settings, sometime in the '90s or early 2000s.

I've even downloaded the manuals for old Sound Blaster cards to look for it, but I can't remember which model I had. Creative Labs released so many variations of seemingly similar cards that narrowing it down feels almost impossible.