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Natural notes playable by a B♭-contrabass tuba, that is to say without depressing any valves. From left to right: B♭0 (pedal note), D1 (ghost note, naturally a bit sharp compared to an equal tempered scale), B♭1, F2, B♭2, D3, F3, A♭3 (naturally a bit flat compared to an equal tempered scale), B♭3.
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