Assertion: concertina's reed | /r/HasProperty | reeds sound
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text: A mass produced 76-key instrument made in the early 1900s that has double reeds (i.e. two reeds sound for each button pressed) is likely to have much less value than a modern, custom manufactured 104-key chemnitzer that has specially tuned quadruple reeds, high fidelity internal microphone, and reed shifts for multiple voices.