I'm looking to use the coaxial SPDIF out on Yamaha - LS9-32 to record a stereo mix on both a Marantz - PMD560 and a rackmount PC. The PMD560 has unbalanced phono inputs and the PC has USB and motherboard 3.5mm line audio input only. I'm not looking to spend too much on doing this but I do want something robust without too much chance of ground loops. It also important that the Marantz recorder works with the PC off. How should I hook it up?
This will be a permanent install and there's plenty of space at the back of the racks and I may possibly be able to expose 1U of rack space if I have to.
(I know the LS9-32 has lots of other output options but we are using them all for other things).
The desktop PC audio line out is connected to an Behringer ADA8000 which is connected with ADAT and BNC word clock to the LS9-32. With the word clock connection in place we do get some hum on the signal from the PC.