Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: disapointing audio-performance

Looking foreward finally to get a concert-DVD with Reba. Video is very good, but the audio is very disapointing. There is audio-format dolby digital 5.1 and dolby pro logic to choose from. I have now tried two different copies, and the dolby digital 5.1 do not work. Be aware if you expect surround sound.