I recently found a copy of the LP "Smokin" that sounds really bad. It's the A&M pressing from 1972, SP-4342. Basically it sounds like typical background noise, but amplified so that it almost drowns out the music. I've cleaned it with some diluted rubbing alcohol and an anti-static record brush, then washed with warm water and patted dry with a microfiber cloth. It still sounds bad, like there's lots of dust in the grooves. I've listened to it on two different turntables with different cartridges, and with three different pairs of speakers. Visually the vinyl is very clean, flat and has only a couple of tiny, almost unnoticeable scratches that shouldn't affect the sound. Any ideas? I'd be willing to try almost anything. It only cost me $1 so it's no huge loss.