Audio issue with Pr CC18

[pamelam50077406]

All of a sudden I do not get any audio out from Adobe PrPro though Built-in line out. All other applications (i. e. ITunes) run normally. I'm running Pr on a 8 core MacPro with SSD, 64 GB Ram and Aja video card (that i'm not temporarily using). Anybody's got the same issue?

Thanks

Pam

[premieregal]

What have you chosen from Premiere Pro's audio hardware preferences for default output?