Grotrian are a company who make pianos, real ones, not ROMplers or whatever… but that doesnt preclude them from engaging in a bit of beautiful interactive work, which in this case involves an algorthymic pianola, which utilises physics of gravity and impact detection to create lovely auto-composition…
Sound a bit like marketing hype? Well ignore me & go have a play yourself!
Suffice to say if it was available as a MIDI sequencer and I could trigger my own piano notes or whatever I would have boght it 30 seconds after first encountering it…. especially after clicking on the GROTRIAN preset!