Locking A4 keyboard to a set key

Is it possible to play the A4 in chromatic mode similar to the rytm?

If this is not possible I may consider swapping my analog4 for a digitakt and use this to play chromatic samples yo make layered basslines.

Thoughts or comments welcome.

My setup is rytm for drums, a4 bass, digitone pads/chords. Making slow dub techno.