Crossfeed settings - ARC vs ROON vs other methods, what is going on?

[GalaxyGlider]

Roon Core Machine

Roon ROCK, Intel NUC11TNHI3, 8GB 3200 Mhz DDR4-RAM

Roon Server Software: 2.0 build 1299, Operating System: 1.0 build 258

Connected Audio Devices

Roon ARC 1.0.40 build 202

Description of Issue

Hi all,

over the couple of days I was experimenting with various crossfeed settings both in ARC and Roon.

At first I did not notice this but the Feed Level settings in both is positive dB:

Roon:
Chu Moy: Cutoff frequency: 700 Hz, Feed level: +6 dB
Jan Meier: Cutoff frequency: 650, Feed level: +9.5 dB

ARC:
Medium: Cutoff frequency: 700 Hz, Feed level: +6 dB
High: Cutoff frequency: 700 Hz, Feed level: +9 dB

Other resources I found on crossfeed always have the feed level at negative dB. From head-fi.org

Here it is quite apparent that the lower the dB number the lower the crossfeed effect is supposed to be. Jan Meier’s setting with -9.5 dB is supposed to be a very minimal crossfeed implementation.
But, in Roon and ARC Jan Meier has a positive dB of 9.5 and would be similar to ARC’s High setting with a feed level of +9 dB or above.

So what is going on? Are these settings in Roon and ARC turned upside down or am I missing something?

[Marin_Weigel (Bram Stoker's Cappuccino)]

Hi, fellow user here not using ARC.

When comparing crossfeed-settings with just Roon on iPadOS/Android/Windows devices, it‘s audibly very clear to me that Roon chose to omit the sign for whatever reason.

So, say entering 15dB results in far more left-right separation than 1dB, as intended - can you confirm, also?

If so, don‘t agonize about the scientifically incorrect notation here and relax to the tunes at whatever crossfeed-setting to sooth your emotions.

[GalaxyGlider]

Hi,

thanks for your reply. I can confirm that the higher the feed-level in Roon the more pronounced the channel separation. So expected behavior just without the negative sign.

What I think needs clarification is the ARC implementation. As here the higher the value goes the less separation you have. So it works counterintuitive from the setup in Roon (comparing input values) but is at least consistent with the presets provided in ARC.

[GalaxyGlider]

Any Roon support active in these forum to provide support to paying customers or is this now all on a user to user basis? I am honestly shocked how little support is being provided here…

[Geoff_Coupe]

The Support team is very small (less than a handful of people) and the Support queue is very long. I suspect that triage will also affect the position of requests in the queue. Your question for Support is more an observation on implementation, rather than a showstopping issue being flagged.

[GalaxyGlider]

Thanks for your reply. I can understand that the amount of support requests might be overwhelming and if this was the only topic which has not seen official support I would not have mentioned it but I have two other open support requests. One which has not seen an official reply in over 6 months and the other thread which describes a major issue regarding stability and reliability is unanswered for 12 days.