This 10-minute solo performance study draws on observations from the experiments regarding respiration and movement scores in order to compose intentional arcs the heart rate of a dancer – and therefore the musical tempo – over the course of a piece. During this solo, the dancer wears the wireless ECG unit, and her real-time heart rate data is processed to inform temporal characteristics and pitch in the electronic music.
The goals of this study include to:
- stress the potential of the ECG prototype, in terms of reliability, durability, latency, and wearability;
- evaluate the effectiveness of the beat tracking and QRS classification algorithms in the software to provide clear data during dynmaic, full-bodied movement;
- choreograph an intentional and reproducible arc in the heart rate of the dancer, including patterns of heart rate variability, via breath and movement; and
- explore music as a source of biofeedback for the dancer, in terms of tempo and pitch.
The model below is the structure from which choreography and composition was developed. Although in this model the line indicating the heart rate of the danger is straight, MacCallum and Naccarato designed the score with particular attention to patterns of heart rate variability during different sections, as well as the processes of transformation between each temporal state for the dancer and music.
Below is a labelled graph that demonstrates the ECG results from one performance of the solo. The heart rate of the dancer, Teoma Naccarato, follows the score fairly closely, with expected patterns of heart rate variability based on breath and movement. Importantly, the arcs in heart rate tempo and variability from this solo have been repeated numerous times by Naccarato, as well as by a second dancer, Bekah Edie (scroll down for additional charts).
Solo, Dancer A (Teoma Naccarato) – Run 01
Solo, Dancer A – Run 02