I have an octatrack too, but compared to the A4 it’s a pain to program the sequencer. Also I can’t figure out how to mute the midi channels at the same time as the sampler channels, so I haven’t been using them.
The Rytm is such an amazing machine , i love it but its such a shame it can’t do it!.. hoping they release it in a later OS… it seems possible because i can control my DSI synth notes with the RYTMs chromatic mode, it just seems silly that it cant sequence other things! would be such a big selling point to others that were interested in the RYTM if it was available