Hello Guitpic1,
When you connect a device like iPhone, iPad, etc, with the Yamaha Smart Pianist app to a CSP 150 or 170, a P-125 or P-515 or other compatible model, you get many additional features, including music styles, capacity of setting several parameters of the instrument and many more exciting functions. I just looked at a few of many Youtube tutorials: impressive! And you benefit from a colourful, user friendly touch screen.
On a CSP, according to a video of Gabriel Aldort, you control about 700 voices, 450 4-variations styles, a VH2 voice harmonizer, and so much more. And the app is free.
I wish it was compatible with my Genos…