11 Jul
2004
11 Jul
'04
7:29 a.m.
From: Dr.Graef(a)t-online.de (Albert Graef)
does anyone know a library (preferably C/C++, or anything that
interfaces to it) which implements the Prony algorithm (a.k.a. least
squares fitting of a sampled signal to a sum of damped sinusoids)?
I placed a couple of papers at
ftp://ftp.funet.fi/pub/sci/audio/devel/dsp/
Please make the source code available (GPL or public domain
or equivalent). Do you need more papers?
I need a detailed spectrogram to Audacity. Audacity may now have
only FFT based linear scale spectrograms. I will draw manually the
pitch curves over the display. Instruments to be analysed are flutes,
violins and guitars. Both time and frequency accuracy should be good
when tracing the single pitch curve.
I will check more papers on the topic but I really would like to
see an overview of what techniques are available. Maybe a search in
the web helps.
Juhana
13 Jul
13 Jul
12:10 a.m.
Juhana Sadeharju wrote:
I placed a couple of papers at
ftp://ftp.funet.fi/pub/sci/audio/devel/dsp/
Thanks a lot, I'll have a look at that.
Please make the source code available (GPL or public
domain
or equivalent). [...]
No problem there, I always publish my stuff under the GPL anyway.
I will check more papers on the topic but I really
would like to
see an overview of what techniques are available. Maybe a search in
the web helps.
We've already done a fairly extensive web search for literature and
links (mostly focused on automatic transcription, though), but I still
have to work through that. I'll make the results available if they turn
out to be useful.
It looks like Prony has been superseded by recent developments (last 10
years or so) which offer better efficiency and numerical stability.
BTW, as you're from Finland, maybe you know Anssi Klapuri from Tampere
University? He's been working on automatic transcription a while ago.
Albert
--
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email: Dr.Graef(a)t-online.de, ag(a)muwiinfa.geschichte.uni-mainz.de
WWW: http://www.musikwissenschaft.uni-mainz.de/~ag
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Juhana Sadeharju