[gandlz]

But how does HDX know, how many samples my external Converter needs, to do the conversion?

I have a Universal Audio 4-710d connected via AES to my 192 I/O and those clips are 12 samples late in timeline. Another Mic-Pre connected via ADAT is 16 samples late.

What is new on HDX with HD I/O or MTRX? I can't believe that this is not a problem anymore as long as I can define my delays for specific inputs. In my case 12 samples for AES and 16 for ADAT.