IVX
Major Contributor
you may search in our discord channel, I remember a few USB ISOs mentioned as successfully used with Cosmos ADC.This thread has been very useful for me in developing a Cosmos-based measurement setup. However I have not had any success with the Olimex USB-ISO.
My setup is a MacBook Air (2020) running REW, Topping D10s, and the Cosmos ADC. As in several posts above, the loop Mac --> D10s --> ADC --> Mac is very noisy. Inserting the Olimex USB-ISO did not work at all (Mac --> USB-ISO --> D10s --> ADC --> Mac). The D10s is recognised and seems to work but the results were awful. I looked at the output of the D10s on a scope and could see that the signal was appearing and disappearing intermittently, and stopped completely after a few seconds. Nothing I could do would fix this, including supplying power to the USB-ISO.
So I gave up on that, and tried the Topping isolator instead (HS01). This seems to work as it should and I get pretty clean results. I still need to experiment but the D10s is showing THD+N of -108dB right now, so things are at least ok.
I don't know if my USB-ISO is faulty or if it just does not play nicely with the Mac and D10s combo but I thought I'd relate this experience in case it is helpful for others.