What I heard is that in the big Vibrandoneon there are two sets of reeds, one for blowing in, one for blowing out (my guess was that the bi-directional reeds caused too many problems…); I’m quite sure that in any case you can’t produce octaves with the new Vib. neither the big nor the small version (but the information policy of BB isn’t too good, so perhaps it’s better to wait until the first Vibrandoneon is out – I have got a retailer near my home who will be one of the first to receive the new Vib.)