In regards to Roland' s "Pressure Variant Pitch Deviation" mentioned above, it appears it is not actual pitch bending as one would get from a wheel or a pedal.

Roland's description...

"The V-Accordion's PBM (Physical Behavior Modeling) sound generator simulates each individual reed sound of an acoustic accordion. It then independently controls them according to the movement of the bellows, just as an acoustic accordion generates a sound. In this way, the V-Accordion reproduces the sound of an acoustic accordion at the fundamental level. It fully expresses every nuance of the player�s expression, reproducing even the slightest differences in tone, volume, and pitch in response to the bellows movement.

For example, on an acoustic accordion, a reed sounds at the correct pitch as long as the bellows are moved gently. When the bellows are moved strongly, however, the reed sound�s pitch will be detuned. This phenomenon occurs more notably as the reed size becomes larger. When multiple reeds are sounded simultaneously, the amount of detuning varies reed by reed, resulting in the distinctive rich resonance of the accordion. The V-Accordion�s PBM sound generator simulates the pitch variation of an acoustic accordion�s reeds in response to the movement of the bellows, recreating its rich resonance."

Pretty clever stuff...but it ain't pitch bending.

Ian