the middle to highest of nylon, although more or all of the strings may be gut. The total tension of the strings on the soundboard is roughly a ton (10 kilonewtons).

Pedals

Pedals for harp tuning were first introduced in 1697. The mechanical action of the pedals changes the pitches of the strings. The seven pedals each affect the tuning of all strings of one pitch-class. The pedals, from left to right, are D, C,

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