A Hopf Adaptive Oscillator Analog Circuit as a musical instrument

The utilization of a Hopf adaptive frequency oscillator as a musical
instrument is explored. The analog circuit design of this nonlinear
oscillator are presented, and the procedure to use it as a musical
instrument is described. Although similar to other analog electronics
instruments such as the theremin, the authors believe this is the first
time that an adaptive oscillator has been implemented as a musical
instrument. Ave Maria, D. 839-Bradley Chapman
(https://musopen.org/music/1673-ave-ma...​), is used here as an
example. The dataset contains four parts. 1) vocalAveMaria.mat is
the time series data that was input to the adaptive frequency oscillator.
2) afoAveMaria.mat is the response of the y state of the adaptive
frequency oscillator. 3) pianoAveMaria.mat is the time series
data of the piano accompaniment. 4) Exp_remix_by_y.wav is the
sound file of the adaptive oscillator "singing" the vocal track,
and it is overlaid on top of the piano accompaniment.