OK, plenty of views but no responses so far in the DAC forum after 24 hours so thought I’d try asking here.
When I connect the SU-1 via coax to the SGSD this is what I see on the display:
However, when I connect via i2s (which is the reason for adding the SU-1 to the chain) the “PCM” and “44.1” lines are gone; all that remains is the filter setting. However, I do get sound through the i2s connection (and it sounds fantastic).
I also stumbled across this image from a post in the headfi forums (identical setup to mine) from March of 2017; as you can see the sample rate lines are also missing here with the i2s connection so my experience does not appear to be an isolated incident.
My SU-1 features their latest 4-way i2s circuit (versus the older lvds type). My GCD is less than two weeks old (in my system) so it should also represent the latest implemented technology from PS Audio.
I should point out one oddity I noticed when I inserted the SU-1 into the chain:
When I power on my gear, I always start at the lowest level of the chain and work my way up to the amp, which is powered on last (and reverse the process when shutting down). Being a cautious sort, I always power everything down when swapping out cables, etc. So when I inserted the SU-1 in the chain I powered that up before the DAC, but lo and behold the DAC came out of standby mode, even though the master power switch on the rear was turned off! The only way I could get the DAC to power on normally was to power it on before the SU-1. So it looks like somehow the DAC is receiving a power signal through the HDMI connector from the SU-1 sufficient to wake it from standby…that seems really bizarre but I have been able to replicate this behavior.
I have been working with Tim at Kitsune HiFi to help sort this out (and he’s been incredibly helpful) but at this point I would really like to hear from somebody at PS Audio…