Logic Express 7: No audio from songs created in Garageband 3

When you try to play a song in Logic Express 7 that was created in GarageBand 3, you may get no sound.

That's because songs created in GarageBand 3 will have audio and instrument tracks assigned to output to bus 11 in Logic Express. Logic Express only supports up to 8 busses, so there's no audio.

To resolve this issue, reassign the output for each track to Out 1 to 2 on your audio hardware (or whatever outputs you usually use). The effects from Garageband on bus 1 and bus 2 will also be assigned to output to bus 10. Reassign bus 1 and 2 to output to your audio hardware as well.