yiannis wrote:I have borrowed a UCX II from a friend for listening tests in my studio......how close is UCX to UFX III or 802 fs?
5 cm? Just kidding, sorry, could not resist. ;-)
There are many such questions that cannot be put into words so clearly.
You probably already know that RME is known for its transparent conversion (no additional "mojo" / modification of audio the audio signal).
Better technical data gives you a better feeling, but not everything that is measurable is audible (FS vs non-FS, higher SNR, ...).
Whether this has any relevance for you and your applications, or whether you could hear any differences at all, is another matter.
Reasons why you can't hear it: hearing ability, room acoustic, quality of all components in the audio chain, generally certain limitations or peculiarities of human hearing.
If you want to be on the safe side, get the latest UFX II with the revised analog section of the UFX III. Meanwhile, these interfaces have the proven converters of the ADI-2 Pro FS (the little older model), but without different D/A filter settings because for recording and mixing you want a linear frequency response also at single speed.
Or alternatively, invest in a reference converter from RME, which you can integrate easily into every setup by using AES or SPDIF, see my blog article: https://www.tonstudio-forum.de/blog/Ent … our-Setup/
The reference converters offer nice features like e.g., an excellent and powerful headphone preamp, auto ref level, 4-5 analog stages which keep the dynamic up over a wider volume range, validation of lossless transmission and much more. You can also set different D/A filters, where the D/A filters only deliver subtle differences in sound.
Some model differences and features and interesting YouTube videos you can see in this blog article: https://www.tonstudio-forum.de/blog/Ent … ses-EN-DE/
Also watch this excellent RME video how to linearize your headphones using the PEQ of the ADI-2 DAC/PRO, ADI 2/4 Pro FS: https://www.youtube.com/watch?v=_Nq9ZGAYTwU
For monitoring, different D/A filter might be interesting, but this is far from any night and day differences. Forum member KaiS (who runs a professional studio) tested different D/A Filter on ADI-2 Pro and ADI-2/4 Pro FS and commented on the subtle differences here: https://forum.rme-audio.de/viewtopic.ph … 33#p198633. Maybe you can also hear such differences in your own blind tests, or possibly not.
I would say that basically you can work well with all RME products, they all use quality converters and perform a transparent conversion.
If you have use cases where a lower latency is necessary or appealing, then get the latest models with faster converters, e.g. (from memory) UCX II, 802 FS, UFX II, UFX III. Details see my Excel or even more details in the RME manuals.
Otherwise, look at the features, what is important to you or what you might need. If you are interested in technical data, then compare the technical data of the devices, my Excel could save you some time: https://forum.rme-audio.de/viewtopic.php?id=35156
Hint: maybe you want to wait for information which interfaces (besides UFX III) will finally get the new Room EQ and Crossfeed feature in TotalMix FX: https://www.youtube.com/watch?v=ja-qxkIqbWY
Recommendation: if you are not too much limited by budget and other expenses…
Some of my applications, photos, sound demos, diagram of my setup including "link" to the HiFi corner you can see here:
https://www.tonstudio-forum.de/blog/ent … iii-en-de/
What remains to be said is that with a UFX III you would always be on the "safe side" in many respects. Even if you later want to expand the studio or record at double speed or integrate additional external hardware or expand the preamp capacity. Everything is possible. And as you can see, this interface is also the first to be equipped with these new features. In my opinion, an investment like this is the most sustainable because you buy it once, and it feels like you won't need anything else for the next 20 years. You save a lot of time and money if you don't have to buy a new one or set up all new routings. You also have enough port reserves for the use of loopback and have all options open from the outset.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14