If I were you and I want to play my drums from the 4k and also route my midi sequence from the motif to the 4k I would do several things.
First I would set the motif as the master and 4k as the slave on the motif read your manual on how to do that and on the 4k press MISC page button and SYNC page at least route all incoming midi to sync in section set to midi clock and set the right input INT I or INT II depending on how you did it.
Second on the main page you will assign the drum program to the track you have two the (INT) OUT 1 Part: 1-Drum kit
(INT) OUT 2: OFF
These are basically from midi input A and B that your motif is connected to in the back of the 4k so make sure you have the right out connected. Next since If want my midi sequence from the motif to play the drums in the 4k I need to convert my drum programs to keygroup programs so that all the pads line up Chromatically just like the motif structure so that the right sounds triggers. You see if you load up your sounds in a drum program on the 4k the midi numbers are numbered differently this is on all aka mpcs than GM midi structure on keyboards Roland, Korg, and Yamaha which are keygroup samplers you just need to convert the mpc drum midi organization to the GM keygroup structure to line them up right.
Now it is important that you have no sequences recorded in your mpc so that you don`t get feedback and it is important that the audio outputs of both your 4k and your motif is running into either a 4 channel or 16 channel mixer depending on your setup or a audio interface on your computer to hear your sounds. I guess you know midi is not audio just note information and so on. Also you can turn off your 4k local on by pressing midi page button and press the filter page, check the MIDI IN setting on the top and scrolling down to the event list to 122-Local control and changing it to off.
Now press your make sure the sync on the 4k press play on the motif and your motif should control your 4k and the drum sounds on the 4k and the motif should work out and sync.
Most people including myself do at dabmeister suggested to have the 4k as your main sequencer and the motif as a slave sound module. IF you set your motif to local off you can use your motif`s keyboard to record your patterns onto the 4k`s tracks. Make sure that the 4k tracks are set up like OUT1: OUT-A Ch: 1 Device:Device 1 you have to read your manual on how to name your motif on here and how to set the motif as a slave.
This is a little long wind and yes there even more steps one can do to setup your mpc and motif but you are the key as far as long you want to work.
Think of this the WHY use 4k or Motif as sequencer???
Motif as a sequencer cause ready made patterns, easy automation with a knob turns, arpeggiators in the sequences, and the tons of build in pads, leads, synth drums, and bass. It is all set to go just you may want to use drum pads to program your own pattern instead of the keys. Simply set the 4k to just a controller. Press midi page, press routing and you will see the routing
Midi In-1>>sequencer
Midi In-2>>sequencer
Drum pad>>sequencer
Change drum pad >>>Midi Out-A now you can play your motif drums using only the 4k pads no sequence no triggering the internal sounds nothing.
4k as your main sequnecer is you already have your own drum sounds, phrases, and you love the 4k sequencer as it is simple, the track swing is fan static, shifting the track forward and back, it has 4 midi outputs, 2 midi inputs, and you don`t want to you the patterns on your motif so much you want to make simple boom bap feels not the techno futuristic stuff on many workstations. Actually I like the futuristic stuff but that is just me. You sync all gear to your 4k assign a midi track and program by hand everything on the 4k with your motif mainly as a sound module. Midi track is automatically setup as chromatic scale so no convert is necessary to play your motif sounds.
That is it I`m sure there may be some items I missed or others will add more steps and more advice which are welcome as long as it helps you.
Basically read all the manuals for the steps to setup up the connections and think of your personally preference to work with each sequencer mainly the 4ks or the motif that I think it the first step for you.
I prefer the 4k sequencer cause I`m more experienced with it even though I used triton sequencer, logic sequencers, ableton sequencer, pro tool sequencer, ESX sequencer and on and on it is a preference not a rule.
But I`m open to new ways of working too.
