This Black & Decker "Fire Storm" electric drill has a trigger that when pressed slowly, gradually cycles through its various speeds. The odd thing is each speed with this drill is accompanied by a particular tone. The tones don't correspond to any notes exactly, but they're all in the 6th octave, starting with, approximately, E6 and working up and bouncing around from there. The noise of the whole drill at top speed is about a D#4, in case you wanted to know.
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