Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sounds great, except for the faint squeal in the background

Maybe you won't notice. I didn't at first. There is a faint squeal in the background. I double-checked; it's not in the music files (they sounded fine in a Creative player). I mostly listen to classical music and the squeal really stands out during the quiet parts. Took it back the next day.