Mondo Knows Facts
A harp changes key with seven pedals
Each pedal shifts every string of one letter by a semitone That gives each note three states, flat, natural and sharp, so the whole instrument can be retuned within a beat. The mechanism was developed in the eighteenth century and made modern chromatic writing possible. Harp strings are gut, nylon or wire depending on register. It sits in Mondo's music collection, one of 200 facts that each trace back to the reference below.
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Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
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More facts like this
A piano hammer strikes and drops away instantlyThe escapement lets the felt head fall back so the string can ring freelyTrumpet valves add short lengths of tubingThree valves give seven combinations and a full chromatic rangeA harpsichord plucks strings instead of striking themQuills catch the string, and volume stays fixed regardless of touchAn organ pipe sounds only its own built pitchEach pipe is one note, so a large instrument needs thousandsA bagpipe keeps playing with a bag of airThe bag lets the player breathe without the sound stoppingHarmonicas and accordions share a free reedA metal tongue vibrates through a close fitting slot rather than beating a tube
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Tags: harp, mechanism, instruments
A harp changes key with seven pedals: the short answers
- Where does this come from, and can I check it?
- Each pedal shifts every string of one letter by a semitone. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a music fact?
- Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.