I had a guy in college call me with this exact same problem. Can you help me? Yeah sure I'll come over but it'll cost you a beer. No problem man, please help me!
So I walk over to the turntable, flick this big wad of lint off the stylus. Man you're a genius! Sounds great!
This was 1977. Back when everyone played records. Yet even then hardly anyone had any real idea what was going on. Today, all these people coming back to the audiophile niche that started it all, kind of surprised there aren't more questions like this.