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<div class="moz-cite-prefix">On 20/02/2015 15:28, Rivoire David
wrote:<br>
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<div>Yeah, but there is a link between this two topics, after
having analysed the harmonics I would like to create a sequence
of notes about it and automatically get chords that fit into
it...<br>
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In general, this is not an "easy" task.<br>
I'm currently working (research) on the audio chord estimation (ACE)
topic.<br>
For a "standard" song (polyphonic, poly-intrument) the accuracy is
still far from perfect (~75% of accuracy on a given, limited,
test-set).<br>
<br>
However, for a single instrument, you can achieve good results with
a simple template matching.<br>
You can't work directly on the FFT, but from the FFT you have to
calculate a 12-dimensional mid-level descriptor (called Pitch Class
Profile).<br>
Then you can train your chord templates using a specified instrument
(i.e. if you want to estimate piano chords, you have to train your
templates with your piano).<br>
<br>
Cheers<br>
<pre class="moz-signature" cols="72">--
a.</pre>
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