Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Terrible sound quality

I have no doubt that these two performances, in the hall, were transcendently beautiful. I got this because I love Horowitz and I love these piano concertos. Sadly, the sound quality is so bad it sounds like there was one microphone, somewhere in the back, plugged into the first tape recorder ever made. There must be other Horowitz performances of these pieces. I will look for them. In the meantime, if you have landed on this hoping for something wondeful, keep looking.