<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Hi Dave, For years I used the Sanderson Accu-fork. It is an electric tone buzzer which also has a 50 cent sharp or flat adjustment which I found extremely useful in determining how flat a piano was, and then having the ability to over-shoot by 25% with accuracy. I've since upgraded to the SAT-III, but that's another story. Joseph D. Gotta RPT </FONT></HTML>