how can I connect midi the bitbox 2 with multi-io

[Jas1x]

how can I connect the bit box 2 via midi?

A Midi cable. Maybe either just a stereo minijack cable if the Bitbox does use the Midi standard TRS-A anf if not then you need a TRSA-B Adapter or you use regular Midi cables together with the adapters which are delivered with the Multi-IO. Or I guess via USB?

Is it possible with the matrix to give the trigger and the keynote?

There is in reality no such thing as a trigger in Midi. There is only Note On and Off. And different types, Note on only, Note on following Note off directly or Note on followed by a note off on another step is one of the drummatrix features indeed.

Hi Thomas 
so I can use midi pattern but not drummatrix in midi?
does the midi patern only have 4 viewable channels?