Back in the day when I was experimenting with diy modified Mac Minis as streamers I ran both Audirvana and Roon, each had a unique sound, I'd characterize Audirvana as the softer more forgiving player, Roon rather sharper, more defined. I've now been running Roon on a completely different setup for years, and this setup has evolved. Does Roon have it's own distinct sound, I don't know how to answer this, Roon sound has changed along with the changes in my streaming chain and overall system. I can directly compare Euphony OS Stylus player to Roon and I prefer Roon. I can also incorporate HQPlayer dsp, I prefer Roon with no dsp. By the way Roon dsp really quite bad, HQPlayer far, far superior. I'd suggest all music players sound dependent on system their paired with, they may have a distinct sound, but with a sympathetic setup suspect all can sound quite good. By the way, some of us have found Roon SQ best with two streamer setups, Core on one streamer, Endpoint on another.
Is there a ROON sound?
I finally had to give in and open a ROON account. I bought the highly recommended 432 EVO Aeon server, but it only works with ROON (as an endpoint) or the Logitech Media Server. The latter seemed a bit awkward to get going, so I started a ROON account (so far for a year). The server offers a plethora of filter and up-sampling choices, let alone the unique ability to change the orchestral pitch to 432 Hz down from the now common 440Hz (the way Mozart or even Verdi heard their music before 440 became the common recording standard for sounding "crisper"). [I have tried this option several times but was underwhelmed. But that's just my personal first take on the subject]
Up to now, I listened to most of my music either through Apple Music as ALAC files or Quobuz as FLAC; I also have a Native DSD library and another with YouTube downloads (FLAC as well). The latter go directly from my MacBook Air (M1 chip) to my MSB Discrete DAC, or through an Audirvana rinse cycle.
My first impression listening to the 432EVO/ROON combination on "Brothers in Arms" was like listening with lightly compressed cotton plugs in my ears. That was with the manufacturer-recommended upsampling rate and filter-choice. I could hardly understand any of Mark Knopfler's (admittedly mumbling) musings! I immediately switched back to my Apple Music version and at least heard things like "through the fields of destruction - baptism of fire" and other text bites. The overall presentation was sharper and more acoustically demanding, but with admittedly less-wide soundstage. I then switched back to the server/ROON combo and disabled all filters and upsampling, going into bit-perfect mode. But even then, the overall presentation, while admittedly more bass heavy and spacious, the singer's words were still hardly intelligible. I actually think that "Brothers in Arms" is a really good example to test for a component ability to shine light on sung or spoken words; another favorite example is Boz Scaggs' "Thanks to You", where the clearest presentation in my system comes from the LP (which is called "Dig"), followed by Quobuz.
I went back to the 2022 review of the Aeon server in Absolute Sound by Andrew Quint, where he extolls the sonic virtues of the instrument (but, like myself, did not like the lower pitch option). I trust that he could not detect the same flaws as I did, albeit streaming from ROON as well.
I understand that ROON emerged from the previous SONOS company. A good friend of ours was one of the first SONOS adopters some 30 years ago, but I never liked it in a musicality sense, especially the gooey bass. To me it always sounded like Musak. So, I might be a bit prejudiced here, because what I am hearing now from ROON is as "pleasing" as the old SONOS; kinda lounge character, but not really stirring or attention-grabbing.
So, I would like to hear the unvarnished truth from this illustrious audience, what their experience with ROON is in terms of musicality and neutral/natural presentation, especially if they can offer some kind of A/B comparison from their own listening experience. As I said, I have zero previous experience with ROON, and might just be a bit biased here.