Gliding one sustained note up or down, passing other keys, is not possible on the Augmented Keyboard Action of Osmose. This playing technique is only possible on MPE instruments from other manufacturers, e.g. the Continuum Fingerboard, the Seaboard or the Linnstrument. This restriction is due to the segmented surface of the traditional keybed form factor, which we felt was most important to maintain.
However, we are working on an advanced portamento mode, where you would be able to play legato melodies, modulating the portamento time by the intensity of the pressure that you apply to the next respective note.