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Posts: 8
Registered: Mar 20, 2009
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Posted: 2009-04-08 16:38:24
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I've started uploading some music tracks for analysis, and was wondering where there is documentation on the definitions for the Key, Mode and Loudness parameters? Here are some example values that I've received:
Key: 1 (0.67)
Loudness: -22.898
Mode: 1 (1.0)
(Are there only 2 modes currently supported, major and minor?)
Many thanks for your help. Your API is a wonderful analysis tool for musicians.
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Posts: 8
Registered: Mar 20, 2009
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Posted: 2009-04-08 16:40:27
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Kindly disregard the Loudness question - I see that it's an average loudness in decibals. Still curious about the Key and Mode parameters, though...
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Posts: 8
Registered: Mar 20, 2009
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Posted: 2009-04-08 16:40:27
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Kindly disregard the Loudness question - I see that it's an average loudness in decibals. Still curious about the Key and Mode parameters, though...
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Posts: 914
Registered: Sep 08, 2008
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Posted: 2009-04-08 16:43:27
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Musicality:
Keys range from C to B (C, C#, D, D#, ..., B), where C corresponds to 0 and B to 11. The mode (minor or major) is given by get_mode as 0 or 1. Hope it helps - thanks! - Paul
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Posts: 8
Registered: Mar 20, 2009
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Posted: 2009-04-08 16:52:03
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That's perfect! Thank you.
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Posts: 2
Registered: Apr 28, 2009
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Posted: 2009-04-28 09:25:39
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I would like some more information about the average loudness, if possible - is this simply the average peak level ? Or the RMS level, or some other more sophisticated estimate of loudness ?
Thanks for your help,
Ian
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Posts: 914
Registered: Sep 08, 2008
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Posted: 2009-04-28 13:25:59
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Ian - the overall loudness is derived with a weighed combination of the individual loudness values (starting and max loudness) for each segment in the track. The weights were derived based upon a user study.
Paul
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Posts: 2
Registered: Apr 28, 2009
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Posted: 2009-04-29 15:09:52
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So you mean - the peak level is sampled at the beginning and end of each segment, and the average (mean ?) is taken ? And this value is then weighted ? Or, have I misunderstood ?
Ian
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Posts: 1
Registered: Aug 28, 2009
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Posted: 2009-08-28 15:59:42
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Hello, I would like more information about the mode (major/minor) and tempo of a song.
I have prepared two short excerpts of blues progressions, and loaded them here:
http://www.iiia.csic.es/~claudio/ismir09/major.mp3
http://www.iiia.csic.es/~claudio/ismir09/minor.mp3
Then I have run the echo nest analyser to check for their tempo and mode.
Regarding the major excerpt, the returned mode is 0 with confidence 1.0, but I was expecting a mode of 1 (major).
Could you explain the reason for this?
The other issue is a minor one; the tempo of the minor excerpt is 60.278 bpm (confidence 0.581); however in my opinion the tempo should be twice this value. But I can understand better this issue, while not the previous one about mode.
Anyone can help? Thanks
.claudio
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