Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best B.B. performance , but WORST SOUND. Shame on you Universal!

Some 20 years after this was sloppily mastered for CD, we are still without a proper sonic upgrade with additional material recorded at the show/s.Universal should go back to the original 3 or 4 track remote tapes and remix them and include previously unissued material.The performance is wonderful, but the frequent drop outs, poorly executed tape edits and extremely thin, shrill mastering on the current edition is truly depressing.Why is B.B. King's greatest live performance completely ignored by Universal and left in this terrible state?