As a first step, can you please add timestamp to the (generic UFX-assigned) name.

Looks like RME Multichannel Utility that joins file segments, may be looking for your standard naming convention.

That's fine - perhaps, keep the naming as-is, but please definitely add suffix with timestamp of the file creation, like so:

UFX01_00_20140709_224305.WAV

This will keep file name convention still identifiable by your utility, but also will make file names unique and human-readable.

High priority for me, friend - and probably for anyone working with more than one device at a time. Like on a film set. Even if you genlock everything, media management is next to impossible without absolute time reference in the file name (or at least its universally-readable metadata.)

Difficulties? A $30 alarm clock sets itself over radio to the current time with high precision. This is an old, proven technology (at least here in the US.) One doesn't even have to set the time. Not sure how much easier can this get. Remember, we are not talking sample (or even frame) precision here; rather, 1 second precision is fine. This is just to see what media belongs to what production, and how it correlates to other video/audio files being recorded at the same time. Exact sync can then be done in post, but at least the timestamp in the file name gives a "good enough" reference point.

Thinking aloud here: when PC or iPad are connected, UFX could get current timestamp from them, even now, programmatically. That timestamp could then be used to add a suffix to the file name in DURec. You don't even need a running real-time clock in UFX for that - just poll the USB-connected device once at the point when you create/name the next file session...

Plus, I really think you RME engineers are somewhere in demi-gods status I used and thoroughly enjoyed your other devices too, throughout the years. Always stellar performance (but not loving the front controls, too confusing for me, so iPad app was a game changer here!)

Of course you guys can do whatever you set your minds to.

naming would be a very welcome addition here, even if it was just named as the totalmix channel name...

Also maybe slightly off topic.. but when using the "RME Spltter v1.0" tool to import these into separate files on my pc, it would be extremely useful to choose which tracks stay mono and which tracks are stereo (i realise I could edit these later.. but the less work the better when dealing with huge long wav files)

These features have been discussed a lot in the past.  My original comments still stand.

While the possibility of importing time from an attached device has been suggested, note that the ability to record "stand-alone" is a significant part of the DURec feature.

It is understood that the current UFX brain is resource limited.  However, since the option is now there to control the UFX via USB from an iPad (or indeed any other device), there may the possibility of assisting users like PrimeHD by allowing TotalMix (or possibly a third party extension App) to "log" each start and stop of DURec using the iPad (or other device) real time clock, and produce an exportable log which could then be used to conform the DURec files (or just provide a written reference during audio post for 'normal' users).

Maybe easier to realise than diving into the crowded firmware space of the UFX?  Just a thought ...