You have to use a Blackmagic sequence preset to enable output through the card/device. I don't know if this differs on a Mac, but to change audio output, go to Edit > Preferences > Audio Hardware.
Thanks for the reply. This seems to be where I get stuck. I have my Audio Hardware preferences set to Built-In Line Output.
When I play a clip in the Source monitor, I can hear it in my speakers, but I can't see it on my NTSC monitor. When I then drop that clip into my Blackmagic timeline, I can see it on the monitor, but I can't hear the audio. Is there any way to set it so that I can see it and hear it at the same time?
try the following,
try set default device to BM or your onboard sound card
or Asio settings and tisk the BM box or onboard sound.