Agraffes in U/R pianos

[Byeway222 at aol.com]

Hi List,
A recent college purchase of  6 Yamaha U5 uprights has added  advantageously 
to the  stock in our college.   I hadn't seen this  model before and it is a 
very good and serious studio  piano.  The touch is firm, the middle pedal is a 
sostenuto, there  is also a lever operated 'muffler' rail. It also has the 
feature  I have always felt should be on all serious uprights, i.e. a large  
music desk which is part of the top panel which pulls forward allowing more  tonal 
clarity and volume from the piano.  However, to the subject  in hand.  This 
model has agraffes for all the middle tenor/ treble  section and pressure bars 
for the top two treble sections.  Does anyone  know the re-thinking on 
Yamaha's part for this change in an upright model?   Whilst I find the tuning 
marginally easier, there does not appear to be a  significant tonal difference.
 
ric

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