Well, I suppose you could eliminate max as the problem by creating a second patcher that receives midi from an iac port and send stuff to it from your first patcher. Use a midiin, set the port, connect to a midiparser and print the data that comes out.

You could presumably eliminate logic as the problem by changing the input from an iac port to a keyboard (say) and make sure you can hear notes when you play the keyboard.

In particular, only change one thing at a time.