Muting high treble

[Richard Moody]

| Not to mention that the cumulative affect of 3 unisions sounding has
a
| tendency to sometimes create a different pitch than only one single
string
| of a unison being sounded.
| Tom Servinsky,RPT

I would like to see this  proven by blind tests, or by machines even.
One machine
I tired showed it going both sharp and flat from the same key strike.
            --==ric

ps is the "different pitch" sharper or flatter?