Verituner

[Joe & Penny Goss]

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VeritunerHi David,
I feel sort of foolish, the problem with the safe use of the tuner only =
requires one to turn the tuner on its side and not use the base. My =
brain was fixed on the fact that if there was a base it had to be used. =
O:(
Hey #7 below is goiung to make the pitch raise a lot easier for me.
Locking in the target until ready to go on. Will this still leave an =
auto advance?
I have been using the numbers and doing the math in my head as I go.
Joe Goss
imatunr@srvinet.com
www.mothergoosetools.com
  ----- Original Message -----=20
  From: David Bauguess=20
  To: pianotech@ptg.org=20
  Sent: Monday, October 29, 2001 8:21 AM
  Subject: Verituner


  This is in response to several points from the recent Verituner =
discussion:

  1. As to whether or not hardware is a factor in the Verituner's =
performance, the answer is yes. The Verituner 100 uses a dedicated =
Digital Signal Processing chip that, for one thing, enables it to =
simultaneously measure up to eight partials per note. This is done in =
the background as one tunes.=20

  2. The partials of 76 notes are measured, a total of  464 partials. As =
Ron wrote, there is no point in measuring partials in the top octave, =
although the fundamental of those pitches is measured. With this =
comprehensive picture of a piano's inharmonicity, the Verituner can =
calculate tuning targets that consider anomalies in the scale. The =
result is a more highly customized stretch for the individual piano. =
This accounts for the positive reports of Verituner tunings, notably on =
small and poorly scaled pianos.=20

  3. We probably haven't heard the final word yet on the optimal tuning =
sequence, but in general the Verituner can make the optimal use of the =
information it is gathering (as the piano is being tuned) if A4 is tuned =
first and the tuning then begins somewhere in the center of the piano =
and proceeds upward by step, and then from the center down. The current =
recommendation is, after tuning A4, tune A3 to C8, then G# to A0. Dave =
Carpenter is conducting an analysis that will lead to a definitive =
recommendation.=20

  4. It is important to understand that tuning sequence with the =
Verituner is only a concern with with the first tuning of a piano with =
the Verituner. Once the "complete" inharmonicity information is =
collected, it is used for subsequent tunings, as long as the saved file =
is used. At that point sequence does not matter to the Verituner.
  =20
  5. The Verituner's Measured Tuning mode is used to save an aural =
tuning. A single partial of each note, which can be selected by the =
user, is measured and stored.

  6. A new feature in the latest firmware release (a free download that =
will be available today) is the ability to alter calculated tuning =
targets and store them in the tuning record. The real power of this is =
that the altered targets are used in all recalculations of the tuning.=20

  7. Enhancement of the pitch raising mode is in the newest release and =
should result in significantly improved performance. The markers that =
indicate the starting pitch and the overpull target now lock immediately =
and stay locked, although they can easily be erased by the user and =
reset. Overpull percentages for three sections of the piano can now be =
specified by the user. Furthermore, the user can quickly tell the =
Verituner where the sections begin, and the Verituner automatically =
switches the percentages as one tunes. It also automatically transitions =
the percentages from the tenor into beginning of the treble and tapers =
it at the top.

  8. For more information about the Verituner's operation and how it =
calculates tunings, you can download the complete User Guide (in PDF =
format) at http://www.veritune.com/downloads.html   An updated version =
of the Guide will be available in a few days.

  David Bauguess=20

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