PeakerOnset Class Reference
[Analysis]

Detects if input contains a onset point. More...

#include <PeakerOnset.h>

Inherits Marsyas::MarSystem.

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Detailed Description

Detects if input contains a onset point.

PeakerOnset is based on the onset peak picking algorithm presented in:

Dixon, S. (2006). Onset detection revisited. In Proc. International Conference on Digital Audio Effects (DAFx), Montreal, Canada.

It takes as input an onset function over time (i.e. a row vector with the times series of a onset function like flux) and evaluates a specific point for onset presence, as below:

Input = [zzzzzzzzzXyyy]

Point "X" at the input will be evaluated. The onsetWinSize control specifies a "look ahead" parameter, i.e. how many samples (represented above as "y") after "X" will be used for evaluating if it is an onset or not (i.e. look ahead samples).

Controls:

• mrs_natrual/lookAheadSamples [w]: specifies the "look ahead" nr of "samples" (the number of "y"s in the above example ) for the detection of an onset at the input.
• mrs_real/threshold [w]: specifies threshold (in % of local mean) for onset detection
• mrs_real/confidence [r]: outputs the confidence that point "X" is an onset (it will 0.0 if it is not detected as an onset)
• mrs_bool/onsetDetected [r]: flags if an onset was detected on point "X".

Definition at line 51 of file PeakerOnset.h.

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The documentation for this class was generated from the following files:

• /home/marsyas/marsyas/src/marsyas/PeakerOnset.h
• /home/marsyas/marsyas/src/marsyas/PeakerOnset.cpp