Cracking the unisons

[b98tu@t-online.de]

>Hi Bernard,

>What are "cero" crossings?

Cero crossings are the points where the amplitude of the signal crosses the 
cero level, i.e. from positive amplitude to negative and vice versa. By 
counting this crossings, one can reconstruct the frequency of the measured 
partial of the signal by dividing the sample rate with the amount of samples 
between two crossings. Requires filtering of the signal before, that no 
other partial produce another cero crossing.

regards,

Bernhard


----- Original Message ----- 
From: "Don" <pianotuna@yahoo.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Friday, January 06, 2006 8:00 PM
Subject: Re: Cracking the unisons


> Hi Bernard,
>
> Perhaps then you could explain this quote (taken out of context) from your
> original post? It certain "reads" to me as if you think "firm blow" is
> required (or at least preferred).
>
>>A good aural tuner tune with a firm struck, to catch also the transient
> phase
>>of the sound at higher volumes. Low volume tuning is like not voicing the
>>left pedal, it leaves the transient phase untuned. But sometimes it may
>>happen, that the pianist also use volumes above mp...
>
> Bernhard Stopper
>
>
>
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
> Non calor sed umor est qui nobis incommodat
>
> mailto:pianotuna@yahoo.com http://us.geocities.com/drpt1948/
>
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