STAHLCELLO
Especially deep tones evolve slowly with a long delay. If played faster the tones interfere with each other in the resonator plate and create sub-harmonic and combination tones.

These overlays are a musical medium as well as an upper speed limit for counterpoint structures.

The present range is about that of a classical string quartet. With four further instruments, this range can be extended to tones close to the limits a human ear can hear.

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