Instruct: Classify a given review into positive or negative sentiment.
Query: optical audio adapter doesn't work

Not sure if the optical audio adapter doesn't work or the HDMI cable carries audio in addition to video which doesn't let the xbox use optical out (it defaults to the HDMI audio). The Microsoft version of this HDMI cable + adapter kit seemingly doesn't carry audio on the HDMI cable so the audio by default goes to the adapter and thus optical out. I suspect the people giving this rave reviews aren't using the optical adapter, just the HDMI cable. Who knows? Whatever the problem is it simply doesn't work.