Cracking the unisons

[Andrew and Rebeca Anderson]

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Mr. Stopper,
I agree and disagree.  A particularly agreeable=20
old Knabe I tuned had a long attack phase that=20
rose five cents or more.  It was blessedly slow=20
to tune too.  I too check tuning over several=20
volume ranges.  The difference, I use a Verituner=20
that samples over a period of time, measuring and=20
remeasuring a note until it has collected=20
inharmonicity info that does not all occur at once.
Not all boxes are made the same.  I check my=20
concert tunings aurally independent of the box=20
after having put the piano in correct pitch=20
solidly with the box.  Not much tampering after that. ;-)

Andrew C. Anderson

At 04:43 PM 1/6/2006, you wrote:
>No they don=B4t and there are good physical=20
>reasons why they don=B4t. (You will find not one=20
>tuner at Steinway (at least in Hamburg) who is=20
>allowed to service concerts with an ETD for=20
>example). This has nothing to do with=20
>traditionalism or ignorance to modern technology.
>Most modern ETD=B4s are doing fast fourier=20
>transformation (FFT) for pitch calculation.
>Be sure, the he ear has no FFT transformator...=20
>There is a big difference in what you get measured and what you hear.
>In some ETD manuals you find sometimes statements of "0.1 Hz accuracy"
>This is true for a signal that would not float=20
>in pitch over more than 2 or 3 seconds to catch=20
>enough samples at the current possible=20
>samplerates. Piano sounds are a really nonlinear=20
>matter that can float in pitch up to some Hz=20
>over a second, when strucked firm. By=20
>transforming a signal from the time domain into=20
>the frequency domain with the desired accuracy=20
>(what most ETD=B4s do), you loose the information=20
>when a singal passes exactly what frequency at=20
>what time. Tuning with an ETD makes it necessary=20
>to tune at low volume levels (Pitch float is=20
>less at low volume levels). A good aural tuner=20
>tune with a firm struck, to catch also the=20
>transient phase of the sound at higher volumes.=20
>Low volume tuning is like not voicing the left=20
>pedal, it leaves the transient phase untuned.=20
>But sometimes it may happen, that the pianist also use volumes above mp...
>
>Bernhard Stopper
>
>
>Qui habet aures audiendi audiat
>
>
>----- Original Message -----
>From: <mailto:tune4u@earthlink.net>Alan Barnard
>To: <mailto:pianotech@ptg.org>Pianotech
>Sent: Friday, January 06, 2006 10:26 PM
>Subject: Re: Cracking the unisons
>
>Yes they do! And just as soon as I finish=20
>hemming these curtains and eating my spinach=20
>quiche I'm going to come right over there and=20
>wag my finger at you. You, you, big meany, you.
>
>Alan Barnard
>Salem, Missouri
>
>
>----- Original Message -----
>From:<mailto:b98tu@t-online.de>
>To: <mailto:pianotech@ptg.org>Pianotech
>Sent: 01/06/2006 3:45:04 PM
>Subject: Re: Cracking the unisons
>
>...nor do they use ETD=B4s
>
>
>Bill Ballard wrote:
>
>Real Piano Men don't use mutes. (you know who you are.......)
>


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