Although I personally have not used it (and remember reading when it first came out that there were probems), the A4 will sync to the clock of your DAW over USB.

Simply go into FUNC+GLOBAL and set the sync to “clock= EXT” and make sure MIDI+USB is selected. I’d also have it receiving transport (start/stop). You won’t have to worry about your DAW sending program changes or note information unless you set it to, so that should be all you need to set for now.