Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not for keyboard instruments

I bought the Peterson V-SAM virtual Strobe Tuner. I was, apparently, not careful enough to recognize that no keyboard related review was available. I need it for harpsichord tuning. However, the response for the lowest octve, (roughly F1 thru F2 at least) and the highest (at least G5 thru G6) is not at all usable.It works ok in the middle range between these low and high ranges, deteriorating on the way to them from the middle.