Yes, it uses solenoid based actuators. Not sure if it controls the dynamics too, but one way to do that would be by driving the actuators using a curve modulated by high frequency PWM; probably quite hard to calibrate to MIDI key velocity since those actuators are essentially on/off devices, but doable.
A very nice project, I'd love to see some more information about it.
A very nice project, I'd love to see some more information about it.