2Bit
8
you must be missing something because its currently working right before my eyes.
its not very complicated so ill list it out concisely
MIDI setup is as follows in your case.
OT is master in your scenario so… OT midi out > A4 midi in then you need A4 THRU not A4 out > MD midi in.4
enter the octa project settings. fn+mixer and under midi> sync
check on transp, clock and prog ch send and also underneath prog ch send change the ch to the program change channel you wish to use. i use 16.
now enter the A4 project midi settings. fn+global and under midi sync
check on transp, clock and prog ch receive as well under midi channels change your prog ch in ch to your desired prog ch channel.
now enter the MD global settings. fn+global then select your global slot. under control you will find prg change turn program change in on and set your channel to your desired prog ch channel.
that should have the OT sending program change with and without the arranger active.