Listen to the first 15 seconds of Cherub Rock . The hi-hats should have a metallic sizzle, not a "shhhh" sound. If the cymbals sound like sand being thrown at a wall, it is a bad lossy transcoded file.
If you want, I can:
When searching for the highest quality FLAC, you are generally comparing three specific masterings. The filename or metadata of your FLAC file will usually indicate the source. smashing pumpkins siamese dream 1993 flac best