This makes a lot of sense, the visceral playability of the ROLI Seaboard RISE together with the USB connectivity and routing of Modular - in this case the Endorpin.es Shuttle (see our review).
The Shuttle system includes a USB host module which allows direct connection of USB controllers, Endorphin.es just updated the firmware to allow MPE control - and as the ROLI Rise 25 in this case has that you can now hook it up.
Every pressed key on Seaboard is a voice that generates the following MIDI data: - Note translated into 1 volt per octave Pitch CV on the separate MIDI channel. - Horizontal movement of the finger on the key or wave surface defines a pitch bender: X-axis control - Z-axis (or depth) corresponds to channel aftertouch - how much finger pressure is applied to the key. - Third dimensional Y–axis is vertical position of the finger on each key. By default it is assigned on CC number 74 and is called "timbre". - Note on/off and velocity as on a usual MIDI keyboard
For a full description of the setup used, see the youtube video
Eurorack module puts General MIDI sound set under creative CV control