<html> <body> I noted this too, but on some pianers...the loss is a good one. Andrew At 10:21 AM 10/3/2005, you wrote: <blockquote type=cite class=cite cite="">David: I took a Pitchlock class at the Convention last year, and it was my impression and that of some other attendees that, while the unisons did become cleaner, there was a noticable loss in tone and volume. This was on a treble note. Have you noticed any such effect? Thanks, Patrick C. Poulson Registered Piano Technician Piano Technicians Guild</blockquote></body> </html>