Topic: ADI-648 - do I have a faulty unit?
Hi forum, I was wondering if anyone who has the same unit could shed some light on this issue I've noticed.
I have a ADI-648 mk2 that I have connected between my HDSP Raydat and DA converter (through one coaxial cable to the MADI input on the DA converter). I have done no routing in the ADi's matrix router (it is completely turned off) and I'm running at 48k. For years I have had no issues with this setup and and everything has been working as expected.
I recently also connected my ADI to another interface, a SPL Madicon (through the previously unused optical ports on the ADI), to be be able to send 32 channels in parallel both to my DA converter and to another computer running Pro Tools. To my surprise, the signal sent through the optical MADI is copying everything that is on ADAT input channels 1-2 to MADI outputs 3-32 as well. This happens only on channels 1-2. The duplicate MADI signal going through the coaxial cable to my DA converter does not do this and works as it has always done.
I thought it might be a bad cable or something, but then I discovered that if I connect any ADAT source to the ADAT 8 input on the ADI everything works as expected again. The ADAT input signal on 1-2 is no longer being split to the MADI 1-32 outputs.
It feels odd to me that there would be a different routing going through the coaxial MADI output vs the optical at the same time. Is this something faulty with my unit or am I missing something?