Accordions, Concertinas, etc. [Free Reed Instruments] 18 - Piano Accordion (of John Somerville)

    23rd January 2011 at Art School, Glasgow (Hutton, Watson & Somerville gig).

    The Piano Accordion was developed in the 1850s in France and Germany. On the right hand side it has a piano style keyboard. It is unisonic producing the same note when the belllows are pushed and pulled. The instrument is more common than the button accordion in English speaking North America, Scotland, and many European countries.

    Piano Accordions are assigned the number 412.13.2 in the Hornbostel-Sachs classification of musical instruments ( en.wikipedia.org/wiki/Hornbostel-Sachs ), indicating:
    4 = Aerophones. Sound is primarily produced by vibrating air. The instrument itself does not vibrate, and there are no vibrating strings or membranes.
    41 = Free Aerophones. The vibrating air is not contained within the instrument.
    412 = Interruptive Free Aerophones. The air-stream is interrupted periodically.
    412.1 = Idiophonic Interruptive Aerophones or Reeds. The air-stream is directed against a lamella, setting it in periodic vibration to interrupt the stream intermittently.
    412.13 = Free Reed Instruments. Instrument features a reed which vibrates within a closely fitting slot.
    412.13.2 = Sets of Free Reads.

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