Octobass flute

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Octobass flute is a name used to refer to:

  1. The contrabass flute, an instrument in the key of C pitched two octaves below the concert flute and one octave below the bass flute
  2. The double contrabass flute, an instrument in the key of C pitched three octaves below the concert flute, two octaves below the bass flute, and one octave below the contrabass flute