Was struggling with this myself a while ago, but didn’t go in depth, as at that time I stumbled across a bug where no midi could be sent out the host port of the Akso, Nic is aware (there’s a bug report on Github)
Thing is the USB A port on the Axo is Midi Host, and if you have connected the Device port of the AKSO to the computer for power & patching then conversely the usb C port you plug in to AKSO from AXO is also the Host port (I recall Nic saying that this particular port can be either and has a chip to detect which it is)
However the relationship should be Host to Device with back and forth communication (bug notwithstanding), not Host to Host, as far as I’m aware, please someone correct me here, So I suspect that both ports cannot simultaneously be Device ports.
I tried to Power the Akso from the Host port of my Axo, plugging into the device USB C port and booting into a patch from the sd card at startup but was unsuccessful, no power up leds and a high pitched whine emitted…at that point I gave up until the midi host bug was fixed.
I have been successful using Host mode and controlling parameters with the Novation Remote SL MK1 keyboard and Zero and also The Digitakt, so it does work (again bug notwithstanding)
I am on a Mac and could theoretically use the IAC driver or some other program to translate midi from Akso to Axo on the same computer but have never attempted to and wouldn’t know where to start on windows something like MidiOX or Midipipe to translate …no idea Sorry do you use a DAW? Din Midi from Axoloti into daw and then out via an external midi instrument to Akso as a midi device perhaps