Topic: RME Aox-D install and configure pointers
As posted on Gearspace. To share my experiences which may be helpful for other people.
After a long while I finally managed to get two RME Aox-D cards plus 4 SPF modules.
So I finally can experience for myself what this is about.
If you have any questions feel free to ask in this topic or send me a PM.
The first thing I would like to mention is that the Aox-D by default came with outdate firmware and you cannot use the card without the newest drivers without updating the firmware. But here comes the kicker. The flash update tool doesn't work on all computers. My main system which is a AMD Threadripper Pro with an Asus WRX90-E Sage SE motherboard (Windows 11) didn't take kindly of the. So I had to use my other computer Intel I9 13900KS with Gigabyte Z790 UD AC (Windows 11) which was able to flash the firmware on the Aox-D. So word of advice. Make sure that if your computer cannot flash the firmware you have alternative systems to do that job. I don't know if it's an AMD vs Intel thing since N=1 issue. But it's a little bit disconcerting. It's actually mentioned in the online manual that if you cannot flash the firmware on your computer you should use another one. I would strongly advise RME to at least add an paper in the box itself mentioning this fact and also make sure the units are shipped with more up to date firmware.
As for the installment. The Aox-D card is a single slot PCI-e and each expansion module with two SPF IO is also a slot (but obviously no PCI-e connection).
The Aox-D doesn't have a wordclock input so if you really want to use one you can use the one of an expansion module. The Aox-D has two network connectors for Dante (or Milan) a headphones output and the breakout cable for AES3 and Midi IO. Note that both AES3 and headphones each take up two of the available 512 IO.
During the flashing debacle it turned out that the Aox switched to the backup firmware which was showing the Milan version. So most likely the two interfaces are mostly hardware compatible but have different firmware. And the difference in price could be about Dante licensing.
As for Totalmix it's what you'd expect. There is no FX and thus also no Room EQ though. You simply have 256 IO per card at 44.1/48kHz. In the control panel you can assign the routing in groups of 64 between Dante/Milan or Madi so it's also very easy to setup redundancy if you need it.
As for the Madi cables. The music stores don't sell them since it's easier to get them at computer stores as optical networking cables. I'm using OM-4 type optical cables which are fairly cheap. Then there is the difference between the small SPF connectors or the larger ones. Each SPF expansion unit comes with a little SPF conversion kit where you can hook up your old optical cables from big to small SPF connectors. That can save you some money or more likely effort of rewiring your optical cables. I'll be using new cables since I didn't knew the expansion modules came with these conversion kits. And tbh I don't know if it makes sense to add an additional connection which may upset the optical signal.