So for so good, easy to use, seems very accurate. I have yet to use it to properly place the bridge and saddle on a guitar or to tune bracings on a guitar build. But, it assigns a key to my speaking voice, I noticed. So, I expect it will do equally well in the two areas just mentioned... If not, I will surely let you know. Unfortunately, I've had this order in for this device since late June, I understand the difficulties you and every business in this country has had to contend with, Covid-19. I received delivery just recently, but only after I had written to cancel the order, shortly thereafter I was notified that my oder was in transit. A speedier response, on the part of the vendor / mfr would have garnered a 5-Star.