It's really difficult at times to remember what it truly should sound like (and in some cases look like) for multiple reasons:
1. We all typically played these games in noisy arcades or pizza parlors which aurally affect the sounds.
2. The speakers on many machines don't always functions 100% as they should.
3. As the hardware and the cabinets aged, the sounds and sights produced by them can change quite a bit.
4. We're all getting older.

5. The hardware we're using to replicate the sights and sounds may be quite different from that on which we originally played.