I created a project with only 1 track (MIDI), and only 1 Object. In that object I created two control events, BankSelectMSB:=8 and ProgramChange:=21.
I then tried to "mixdown as MIDI", and an entry in the "Mixdown" list of the MediaBay is created as expected.
==> Bug: then I cannot insert (drag and drop) that back in into any project.
Workaround: If I add at least one MIDI note event into the same MIDI object and mix it down, I can insert (drag and drop) that back into any project. Not clear what is the minimum content without side effects for a MIDI object to have the reimport working.
A side-issue I noticed: it would be really convenient for the workflow if I could move MIDI objects from the MediaBay/Mixdown list to the MediaBay/MIDI list, without having to send it as an EMail draft, close that daft (if not saved and reopened as draft, you cannot tap the attachment to import it), open that again, then tap the attachment, then import into Cubasis, then delete the EMail draft again ... Hope you get the idea of how cumbersome work is under iOS when you have to leave the MediaBay abstraction layer and fool around with apple file/mail exchange. Could be achieved in a single drag-and-drop action.
Another side-issue (more of a feature request):
I cannot select a MIDI object and export it directly to MIDI, but have to first copy the MIDI object of interest into an empty project with a single, empty MIDI track. Then mixdown that dummy project as MIDI. Not efficient, but maybe Cubasis has to "mix in" alls sorts of context into such an export, such as "MIDI channel of the track" etc. , so I can see the logic behind full-blown "mixdown" semantics. Still if you knew how to more efficiently export only 1 single track from a multi-track project (muting the other tracks did not work), I'd be very glad to learn that.
Btw., just having to tab and hold an object to have the "L"- and "R"-locators auto-adjust is one of the coolest user experiences I have ever seen on any platform, and works so well with "mixdown between locators". In summary: horizontal free-form selection works, vertical free-form-selection works not.
My motivation is to create a set of MIDI-Snippets in the MediaBay/MIDI list, named for instance