Dear Matt,
It was not possible so far to get the central frequency of each chroma.
But I just modified slightly mirchromagram. Unpack the enclosed file, and
replace your previous @mirchromagram subfolder with the new one, and
restart Matlab.
Now you can do the following:
c = mirchromagram(..., 'Tuning', t) % where t is the frequency
associated to chroma C get(c, 'ChromaFreq') % will give you the central
frequency for each chroma (in the unwrapped representation)
M McVicar kirjoitti 2.5.2010 kello 22.32:
Dear list,
when I call 'mirchromamgram' with the 'nbins' option (let's say I set
nbins=3) which frequency bands are the resulting 12*3 dimensional feature
in?
In your case, you should use 'Nbins', 12*3 (instead of 3)
are they grouped like this:
...
A4 + 2 thirds of a semitone +octaves
A4 + third of a semitone +octaves
standard A4, 440 Hz + octaves
...
or is it symmetric, like this:
...
A4 + third of a semitone +octaves
standard A4, 440 Hz + octaves
A4 - third of a semitone +octaves
...
My problem is I have mis-tuned songs and I wish to use different
reference tunings for some of them. As far as I know I can't call
get(my_chromagram,'Frequency')
as the octaves are being summed right? I hope this is clear despite my
clumsy notation!
Matt
--
Matt McVicar, Bristol Centre for Complexity Science
mm4819@xxxxxxxxxx
Olivier
