Very Good. But why?
-Original Message-
From: Ed Durbrow [mailto:edurb...@sea.plala.or.jp]
Sent: 05 January 2009 23:33
To: Herbert Ward; LuteNet list
Subject: [LUTE] Re: Fourier measurements of lute sound.
Wow! Nice work.
Do you have any screen shots of the Fourier analysis?
On Jan 2, 2009, at 7:01 AM, Herbert Ward wrote:
> Using computerized Fourier analysis, I measured spectra
> of lute sound, using all strings in courses 1-6, plucked
> with good tone.
>
> Several unexpected features cropped up.
>
> 1. The pitch of a harmonic often shifts over the duration
> of the note, up to 10 cents.
>
> 2. The volumes of the harmonics often change relative
> to each other. Sometimes this can be a strong and
> surprising effect, as when the fundamental is basically absent during
> the initial 0.3 second, and then assumes dominance over the harmonics
> as the note dies away.
>
> 3. The harmonics' pitches are not consistent with each other,
> especially during the initial 0.3 second. For example, the
> fundamental can be at -4 cents, and the first harmonic (an octave
> above the fundamental) can be at +4 cents.
>
> These observations provide an ample hypothesis for tuner instability,
> but unfortunately suggest no solution.
>
>
>
> To get on or off this list see list information at
> http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
Ed Durbrow
Saitama, Japan
edurb...@sea.plala.or.jp
http://www9.plala.or.jp/edurbrow/
