This might help:https://forum.renoise.com/t/how-to-split-your-midi-keyboard-in-renoise/43006
which links tohttp://tutorials.renoise.com/wiki/MIDI
“You can assign individual MIDI input devices to an instrument or even several different instruments. You can also specify the MIDI channel and note range which the instrument is activated by, as well as assign it to be played on a particular track within Renoise. These options are particularly useful when performing live.”