Hello Fares

I didn't experiment much with beat detection ;

bonk~ is very well suited to short-duration/fast decay and fast attack sounds, such as african percussions, snare drums, etc

When the attack is not sharp enough, or when there is another sound behind the attack (like a constant pad, for example), it may not work because there is no clear attack in the global signal (the pad creates a mask that hides the attack, for example)

One idea (though I never tried this) : use bonk~ and threshold~ together, in order to have more parameters for deciding if there is a new attack or not.

Fares Kayali wrote:

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hi there!

I'm trying to get some kind of allround beatdetection using the bonk~ object to control video with the output values... but as i'm no audio expert i have some troubles getting consistent accurate outputs... I would be happy if anybody had some advice or examples about beat detection. ...perhaps there are some alternatives or extensions to bonk?

thanks Fares

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On Friday, Jul 11, 2003, at 06:06 America/New_York, Marc Lavallée wrote:

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Le 11 Juillet 2003 04:53, julien.breval@tremplin-utc.net a écrit :

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bonk~ is very well suited to short-duration/fast decay and fast attack sounds, such as african percussions, snare drums, etc

The rhythm_estimator external works with non-percussive musical genres: http://www.cs.tut.fi/sgn/arg/music/jams/ ftp://iem.kug.ac.at/pd/Externals/RHYTHM/ (also included in the CVS)

I think the output of [bonk~] and rhythm_estimator is different.
[bonk~] outputs a note for each detected attack, while rhythm_estimator outputs a BPM number for a given piece of music (if I remember correctly).

.hc