Title pretty much sums it up, but I'm experiencing overloaded and therefore distorted output from the RME audio interface. When I switch to built in output everything is fine. I also experience this problem with the ProTools Aggregate IO selected.
Has anyone experienced this before and were you able to correct the problem?
I would recommend reading the FAQ section of the Knowledgebase:
https://baseheadinc.com/index.php/knowledge-base/macos-general-faq/
There are a few notices about this exact case:
Distorted Audio:
If you have an Apollo interface or similar it may be related to the setup of “Virtual Outputs”.
Try using a Channel Offset (in the BaseHead Audio Options section) or failing that you may have to change the configuration of your interface using its configuration app to remove the virtual outputs.
Pro Tools Aggregate Audio Driver Issues:
Simple….do NOT use it! 😉
It’s a fake driver and not a very good one. Plus if set up wrong will cause crashing so avoid it all all costs if possible.