I tried the Kontakt 2.2.3 upgrade only to find out it didn't work with GPO Studio. Instead, GPO Studio loads the previous version of the Kontakt player but sounds cannot be loaded to the player because they have been modified for version 2.2.3
I depend a lot on GPO Studio. I use it with Sebelius 4 because I don't have the Sibelius bundle.
Is there any upgrade for GPO Studio that supports Kontakt Player 2.2.3?
Go to MIDI setup and enable the IAC driver. Each IAC bus can handle 16 MIDI channels. So enable multiple buses to cover the amount of channels you need. KP2 standalone can use up to 4 for a total of 64 channels.
Next, call up KP2 standalone. Go to File > Audio / MIDI Setup. Click MIDI tab. Under the "Input Interface" section, enable the IAC buses.
In your application you're using, set it up to output to the IAC buses.