Percy Grainger - Sliding pipe free music invention
  Year :   1946
  Location :   USA
  Worktype :   Instrument / Free Music Machine
  Materials:   -
  Info :   -

  Work Details  
  Flat piece of masonite with two slide whistles supported on wooden blocks- slide rod is attached to a horizontal wooden rod with string which slide along a groove cut into masonite. Grainger and Cross earliest experimental model to produce gliding tones.