That's all fine and dandy when you're talking about a genuine piece of music. But for something like this, counting a rest that goes for 17 years is taking it way too far.
a: vocal, instrumental, or mechanical sounds having rhythm, melody, or harmony
b: the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuity
…and yet that answer entirely misses the point that the question is about the choice of definition.
You can certainly play a recording of the piece at whatever speed you desire, and decide if it has rhythm, melody, harmony, unity, and continuity. Extremely slowing the piece down does not remove those things.