SuperCollider CLASSES (extension)

AnalyseEvents2
ExtensionExtension

event analyser (BBCut)
Inherits from: UGen : AbstractFunction : Object

Description

//This file is part of MLfftwUGens. Copyright (C) 2006  Nicholas M.Collins distributed under the terms of the GNU General Public License full notice in file MachineListening.license

//This file is part of The BBCut Library. Copyright (C) 2001  Nick M.Collins distributed under the terms of the GNU General Public License full notice in file BBCutLibrary.help

On-the-fly event analyser, based on onset detection/on-the-fly analysis described in my academic papers. Best for percussive events. Recommended that you go via the Segmentation (for one-pass) and AnalyseEventsDatabase (for on-the-fly) classes in standard usage, don't use this directly.

NOTE: you will need bbcut2 for further classes and capabilities. This UGen is included in sc3-plugins for cross-platform building.

Class Methods

*ar (in, bufnum: 0, threshold: 0.34, triggerid: 101, circular: 0, pitch: 0)

Arguments:

in

Audio input to track

bufnum

A buffer within which results of the analysis are place

threshold

A parameter acting as the onset detector threshold, default of 0.34 was determined as the best performing over a database of percussive onset, but you might want to change this to change the sensitivity (though you always increase the risk of false positives or false negatives)

triggerid

A trigger ID number used for communication from the UGen to the Lang to mark that a new event was received. Only passed for on-the-fly analysis.

circular

A flag to note on-the-fly analysis assuming a circular buffer. If you only need a one-pass analysis on a file, you won't use this.

pitch

Can take a .kr pitch detection UGen as input. Will take the median fundamental frequency over a note event from values recorded from this pitch input.

Inherited class methods

Instance Methods

Inherited instance methods

Examples

No examples are given, to discourage solo use.