Pianoteq gui on second display

I’m using pianoteq stage on my zynthian (that’s really cool!) and would like to have the user interface of pianoteq displayed at an extra screen attached to the zynthian box.
I know that it’s possible to login via ssh with X11 forwarding or via vnc, but that requires an additional computer. I’d rather like to keep it simple.
The internal zynthian display is attached via SPI interface.
Then, there is the DSI interface to which for example the official 7 inch raspberry display attaches via the ribbon cable, and then there is the HDMI output. Did anyone try to use HDMI or, preferably, DSI (because of touch interface), to show the gui of e.g. pianoteq?
Looking forward for hints or clarifying comments :slight_smile:
regards, hal

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