be.tarsos.dsp.beatroot

Class Induction

java.lang.Object

be.tarsos.dsp.beatroot.Induction

public class Induction
extends java.lang.Object

Performs tempo induction by finding clusters of similar inter-onset intervals (IOIs), ranking them according to the number of intervals and relationships between them, and returning a set of tempo hypotheses for initialising the beat tracking agents.

Field Summary

Fields

Modifier and Type	Field and Description
static double	clusterWidth The maximum difference in IOIs which are in the same cluster
static boolean	debug Flag to enable debugging output
static double	maxIBI The maximum inter-beat interval (IBI), i.e.
static double	maxIOI The maximum IOI for inclusion in a cluster
static double	minIBI The minimum inter-beat interval (IBI), i.e.
static double	minIOI The minimum IOI for inclusion in a cluster
static int	topN The maximum number of tempo hypotheses to return

Constructor Summary

Constructors

Constructor and Description
Induction()

Method Summary

Methods

Modifier and Type	Method and Description
static AgentList	beatInduction(EventList events) Performs tempo induction (see JNMR 2001 paper by Simon Dixon for details).
static void	newInduction(EventList events) An alternative (incomplete) tempo induction method (not used).

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

clusterWidth

public static double clusterWidth

The maximum difference in IOIs which are in the same cluster

minIOI

public static double minIOI

The minimum IOI for inclusion in a cluster

maxIOI

public static double maxIOI

The maximum IOI for inclusion in a cluster

minIBI

public static double minIBI

The minimum inter-beat interval (IBI), i.e. the maximum tempo hypothesis that can be returned. 0.30 seconds == 200 BPM 0.25 seconds == 240 BPM

maxIBI

public static double maxIBI

The maximum inter-beat interval (IBI), i.e. the minimum tempo hypothesis that can be returned. 1.00 seconds == 60 BPM 0.75 seconds == 80 BPM 0.60 seconds == 100 BPM

topN

public static int topN

The maximum number of tempo hypotheses to return

debug

public static boolean debug

Flag to enable debugging output

Constructor Detail

Induction

public Induction()

Method Detail

beatInduction

public static AgentList beatInduction(EventList events)

Performs tempo induction (see JNMR 2001 paper by Simon Dixon for details).

Parameters:

events - The onsets (or other events) from which the tempo is induced

Returns:

A list of beat tracking agents, where each is initialised with one of the top tempo hypotheses but no beats

newInduction

public static void newInduction(EventList events)

An alternative (incomplete) tempo induction method (not used). Uses integer (millisecond) resolution.

Parameters:

events - The events on which tempo induction is performed