It's possible to use several MIDI controllers together, as far as they're using different MIDI channels.
The AKAI APC mini works with the MIDI address 1 and it cannot be changed. As far as I know, it's the same for the APC 40. Depending on the MIDI notes and Control Changes used by both units, there may be conflicts.
Some controllers allow to change their MIDI channel but not these AKAI models, I'm afraid.
ok,can you send me some example for akai APC 40 and AKAI APC mini?AKAI APC 40 is OK,It has more chanels, but mini have only one chanel number one.But When I maping on chanel 7 on APC 40, it make the same on akai mini. Thanks for your answers.