·? (drone [Term not mentioned in available sources])
only drone, adjustable: cylindrical, bent, bell, no cavity / single reed
Starting retrograde, it bends down immediately behind the back.
Pitch: E♭; With "S"-piece.
NB: Example(s) to be replaced with staff-notation.
Leydi, Roberto: La zampogna in Europa. Como, 1979, p.149 (type only, no term).