No audio during playback in Garageband 11.
I've gone through some of the forum questions and still cannot figure out the problem. Each individual track shows playback through the volume display except for the master track (nothing is soloed or muted), and I've checked both the System preferences for the Mac and in Garageband. I've also tried to create new tracks to find a phantom soloed track, recorded on them and tried playback. I disconnected my interface, restarted the computer and Garageband a number of times -- still nothing. iTunes works, as do other Garageband projects I've saved. Any help would be greatly appreciated.
thanks!
GarageBand (Mac) '11, OS X Mavericks (10.9.2)