Hey, I want to connect my keyboard yamaha
I would like to connect my yahama keyboard to my audiobox usb and utilize it with my music Prologic
MacBook Pro (15-inch Early 2011)
Have you tried reading the Logic Pro User Guide?
http://help.apple.com/logicpro/mac/9.1.6/en/logicpro/usermanual/#chapter=2%26sec tion=2
You might also want to check out the User Guide for your Audiobox interface too..
See page 11....
http://www.presonus.com/uploads/products/1296/downloads/AudioBoxUSB_OwnersManual _EN1.pdf