Yamaha TF and Garageband

So I'm trying to set my Yamaha TF5 digital mixing console with Garageband and I'm running into a road block. I can record all 34 channels/tracks at the same time and have audio coming into Garageband via the TF5. Once recorded I am unable to play the audio back through the board even though I change the input from line in to USB in. I have contacted Yamaha about this and have been unsuccessful with resolving the issue. I have went to the Audio/Midi settings in Utility and when changing the audio out mode I am unable to change the audio out to all the channels. I can get it to work via 2 channels (left and right which are assigned to channels 1 and 2) but not all 34 channels. I have used Pro-Tools and Logic Pro but I no longer have that software. Any insight and help would be much appricieated.