f(t)25 / 35Pluck house
y(n)=avg y[n-N]
Take a burst of noise, feed it back on itself and keep averaging. It turns into a plucked string.
The equation
y[n] = ρ · (y[n−N] + y[n−N−1]) / 2
What the equation decides
The hook riff, its octave double, the strummed chords and the plucked bass are all this recursion. ρ sets how long the strings ring and drives the arrangement.
What was composed
The riff's melody and rhythm, chords and form.