  We consider elementary excitations in a Bose Einstein condensate, carrying a
finite amount of angular momentum. We show that these elementary excitations
are modified Bogoliubov oscillations, or phonons with an helical wave
structure. These twisted phonon modes can contribute to the total vorticity in
a quantum fluid, thus complementing the contribution of the traditional quantum
vortices. Linear and nonlinear versions of twisted phonon modes will be
discussed. New envelope soliton solutions are shown to exist in a condensate.
