No problem,
Like you said... in OS9 you had a checkbox for "play through output" in the control panel and it was so easy.
Core Audio is miles ahead of what the old Sound Manager was, so it's kind of surprising that such a simple, and useful feature was overlooked.

Glad it worked out for you !

- Jay


MacPro 5,1/12 core@3.46GHz -- OS X 10.14.6 -- ATI 7970 -- 32 Gig RAM -- Crucial 500GB OS SSD -- Samsung EVO 1TB Audio/Sample SSD -- BIAB 2023 -- Logic Pro X -- Cubase Elements 11 -- Too many plugins