There may be some confusion between "capo tasto bar" and "capodastro

The typical sound of a particular piano (e.g. Steinway, or Bösendorfer
grand) partly originates from the short undamped pieces of string that
resonate with the partials of the notes played thus increasing the
brilliance of the piano (high frequency content).
Modern Steinways sometimes have a tendency to over-resonate at
particular notes.

The following article explains the difference in respectively, a
Bösendorfer and a Steinway concert grand piano.

Jos Van Dyck

-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]]On Behalf Of steven austin
Sent: zondag 27 februari 2005 1:22
To: [log in to unmask]
Subject: Re: [ARSCLIST] analyzing room acoustics to identify recording

The capo d'astro bar, I believe, was a part of the secret of
success. So said the copywriter who wrote a later ad series based on
that patented point-of-difference. Somehow, this kept the strings on
treble end from doing something old pianos tended to let them do.

Steven Austin