Claude Sonnet 5.5

Loop plays unmodified in bars 1, 2, 5 and 6. Bars 3 and 4 hold 16 repeats of the loop's head: 4 quarter notes, then 4 eighths, then 8 sixteenths. Each repeat is a Tone.Player slice with a short fade-out, placed on the grid. Pitch rises exponentially, playbackRate = 2^(i/15), so repeat 0 is the original and repeat 15 is one octave up. The render is 11.6 s, measures 124 BPM, peaks at about -3.8 dBFS, and is not clipped.