This design is by Guido Tononi, I am wondering if it will have the same dual valve design to play notes an octave apart. This is what I really like of the Vibrandoneon. Like Tatu’s last Melodica creation to create the vibrato effect. My new Melodica design uses the same reeds as the Vibrandoneon but does not incorporates the dual valve system due to the note bending device. One day I will figure how to make them bend evenly.