Not really a bug report, thought someone might run into the same issue - so here’s the Problem with a Solution.
In djay Pro, the Hercules Starlight headphone jack outputs a crackling sound in the preview audio whenever a second audio interface is used for the main audio out - as if the Starlight headphone jack is not getting enough power. In the photo below, the Mackie MDB-USB DAC (black box with XLRs) is outputting the main audio and the Starlight controller will be used for headphone preview/cueing.
For some reason the crackling in the Starlight headphone jack occurs when the audio is routed directly like this:
But the crackling in the headphones goes away if you put both audio devices into an aggregate device, and route the aggregate device in djay Pro like this:
- The exact same setup with the Numark DJ2GO2 Touch doesn’t have this problem. The Numark works as expected - only the Hercules Starlight has this issue.