From beat tracking to beat expectation: Cognitive-based beat tracking for capturing pulse clarity through time

PloS One
Martin Alejandro MiguelDiego Fernandez Slezak

Abstract

Pulse is the base timing to which western music is commonly notated, generally expressed by a listener by performing periodic taps with their hand or foot. This cognitive construction helps organize the perception of timed events in music and is the most basic expectation in rhythms. The analysis of expectations, and more specifically the strength with which the beat is felt-the pulse clarity-has been used to analyze affect in music. Most computational models of pulse clarity, and rhythmic expectation in general, analyze the input as a whole, without exhibiting changes through a rhythmic passage. We present Tactus Hypothesis Tracker (THT), a model of pulse clarity over time intended for symbolic rhythmic stimuli. The model was developed based on ideas of beat tracking models that extract beat times from musical stimuli. Our model also produces possible beat interpretations for the rhythm, a fitness score for each interpretation and how these evolve in time. We evaluated the model's pulse clarity by contrasting against tapping variability of human annotators achieving results comparable to a state-of-the-art pulse clarity model. We also analyzed the clarity metric dynamics on synthetic data that introduced changes in the beat, s...Continue Reading

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Citations

Jun 10, 2021·PLoS Computational Biology·Jonathan Cannon

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Software Mentioned

DBNDownBeatTracker
MIRToolbox
mir
eval
madmom
DBNBeatTracker
Matlab
MIDI
MIREX
THT

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