Nucleus One installation issues causing server invisibility and connectivity problems (ref#BTGCM1)

Support Nucleus Support
1

What’s happening?

· Other

How can we help?

· None of the above

Other options

· Other

Describe the issue

I just bought a new Nucleus One.
The installation went wrong. The devise has not been connected and is invisible on the app as a server. At times, It becomes visible but software does not connect to Tidal and does not find my other devices.

Of note, initially, I set server to my Mac Studio. It was working well until I tried to connect the new Nucleus One.

Now, my Mac Studio is not working as well.
I have reinstalled my Roon app and it did not help. My network works well with all other devices.

Describe your network setup

Please advise

After multiple effort to reinstall and reconnect to Nucleus One server, I was finally able to connect from my Mac Studio. BUT, now it does not drive my Kliptch R50-PM speakers that are connected to the Mac Studio via USB.

In addition, I still can’t connect to the Nucleus One server using my iPhone. My iPhone software is still showing connection to the previous server on the Mac. It does not connect to other audio devices.

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2

Hi @ankrasko,

Thank you for your post and welcome to Roon Community. Diagnostics automatically submitted to our servers from RoonServer itself suggest that there might be two separate subnetworks in your LAN, one of which the Nucleus is connected to separately from your other remotes.

Can you please share a screenshot of the Nucleus Web Administration Page? This will list some basic network information about the unit.

Do you have a mesh network or any managed switches in this setup?

You’ll also want to ensure that MacOS has granted Roon local network permissions in Privacy & Security.

We’ll watch for your response. Thanks!

3

Hi Connor,

Thank you for your quick response. I do have a complicated network setup that needs to be revised.

Please, let me know me know, what would be a recommended network configuration to run LAN.

At the same time, I don’t understand, why my Klipsch speakers, connected to my Mac Studio via USB, are not playing and are not anymore visible on the audio source on Roon. They were visible and functional while the Roon server was set up on the same Mac.

There is another problem I have encountered. My Roon Arc is not functioning outside of my residence.

It give me a message:

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4

Hello @ankrasko,

Thank you for the update.

Let’s take a straightforward approach and resolve the issues one by one.

Server Migration & Account Association
From the diagnostic data enabled on your account, it appears that your original Roon Server on macOS is still active. Could you please confirm whether you used the same email address to activate your Nucleus One device? Currently, it does not appear to be associated with your account.

When you logged into Roon on your Nucleus One, were you prompted to unauthorize the old server? You are limited to one active Roon Server at a time but you are free to switch between them as often as you’d like

Network Configuration Recommendation

To avoid connectivity issues, we recommend using a flat network topology, ideally with a single DHCP server. Based on the diagnostics, it appears you have devices operating in different subnets (e.g., 192.168.10.150 and 192.168.1.2), which can cause communication problems between your devices.

You can review our recommended network setup here:
:link: Networking Best Practices

Roon ARC External Access Issue

Have you previously configured port forwarding on your router? If so, please update the rule with the new IP address of your Nucleus One.

If you are using Tailscale, make sure it’s installed and activated via the Nucleus One WebUI.

Missing Klipsch USB Audio Output on Mac Studio

Can you confirm whether the Mac Studio’s default audio output appears under Settings → Audio in Roon?

If not, please ensure:

  • System Output and connected USB devices are enabled in Roon
  • The Mac’s security settings allow Roon access to audio devices
  • Make the screenshot of the audio devices and post it here

Please check each of the above and let us know what you find — we’ll continue troubleshooting with you from there.

5

Thank you for your advice. Here are my responses to questions in the issues.

  1. Yes, I deauthorize the Roon Server on Mac using the Roon app. It does not show up in the Roon anymore. Unless, I try to disconnect from the server, then it pops up as a choice.

    Yes, I did use the same email address to activate Nucleus One. Should I have done differently?

  2. Thank you for the network configuration advise. I am working on that.

  3. The Mac Studio’s audio output does not appear under Settings → Audio. But it was 2 days ago.

Just to let you know, my speakers, connected to the Mac, working fine. As they did before, while I was using my Mac as a Roon Server. They stopped responding when I have migrated to the Nucleus One.

  1. I will work on Roon Arc issue and let you know the results.

Thank you again for your good thoughts.

Anatoli

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6

Hello @ankrasko.

Thank you for the update.

No, you shouldn’t have done anything differently. The problem is that the email used on the Community account is associated with a trial license, and we do not see any Nucleus devices linked to it. That’s why I asked if you might have used a different email address.

Based on the diagnostic data, it appears the Mac Studio is discovered as an AirPlay device but not as a RAAT device. Would you kindly try reconnecting to your old Roon server on the Mac, perform a full logout, and then connect to the Nucleus and log in again?

If the audio output still doesn’t appear, please try generating a new RAATServer instance by following the steps below. Note that this will reset the Settings → Audio tab to factory defaults, so we recommend backing up any custom DSP settings before proceeding:

  • Create a Backup of your current Roon database
  • Stop RoonServer from running in Nucleus’s WebUI
  • Navigate to your Roon Database Location
  • Find the folder named “RAATServer”
  • Rename it to “RAATServer_old”
  • Restart the RoonServer in the WebUI to generate a new RAATServer

Let us know how it goes with ARC — we’re happy to assist further if needed.

7

As soon as I logged out from the Nucleus, strange thing happened. One screen shows that I am on the Mac server but the other screen shows that I am still connected to the Nucleus.
Finally, I got back on the Nucleus and nothing has changed.

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It is quite confusing.

I was able to get to the Nucleus’s WebUI. I have reset “Roon Database & Settings” and restarted the “Roon Server Software” . Unfortunately, I didn’t help.

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Now, my Marantz receiver, in addition to the Mac Studio are under AirPlay2 option.

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Please advise.

Anatoli

8

Hello @ankrasko,

Thank you for the update.

From the diagnostic data, we can see that your Mac Studio is receiving IP addresses from both Ethernet and Wi-Fi connections. Please try disabling Wi-Fi temporarily and check if the issue persists when using only the Ethernet connection.

Additionally, we noticed that the DNS address is being provided by Comcast. We recommend changing the DNS to a public provider such as 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) to rule out any DNS-related resolution issues.

Please also check the following:

  1. Local Network Permissions
    Go to System Settings > Privacy & Security > Local Network, and make sure Roon is allowed.
    If it’s already enabled, toggle it off and on, then restart your Mac.
  2. Firewall Settings
    Navigate to System Settings > Network > Firewall, and make sure the firewall is not blocking Roon.
    You can click Options under the firewall settings and ensure Roon and RAATServer are listed and allowed for incoming connections.
  3. Restarting Roon
    After making changes, please restart Roon:
  • Click the Roon icon in the macOS taskbar (top right corner).
  • Choose “Quit Roon”.
  • Then reopen Roon from your Applications folder or Launchpad.

Let us know if the issue persists after performing these steps, and we’ll be happy to continue assisting you.

9

Vadim,

The Wifi on my Mac was incidentally on. I have it disabled.

  1. I have checked the internet network permissions. They were ok and have them toggled off/on.

  2. Firewall was not blocking the Roon.

3 I have Roon and the Mac restarted.

When I turned it on, here what I saw:

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You can see three options for the Mac??? Fortunately, one of them that I labeled Mac-Klipsch was driving my Klipsch speakers. That’s is definitely a good news. But the other two, Mac and Klipsch R-50, were silent.

My Marantz AVR is now in AirPlay connection mode. However, it’s physically ethernet connected. Unfortunately, I am not sure that it was connected previously as a Roon Ready or Roon Tested modes. It might have been not, since the AVR is quite old. But that’s ok, I can live with that.

Overall, It’s better now. Thank you and let’s close this issue unless you have some other suggestions.

There are more things I’d like to discuss.

  1. Roon Arc. It is still not working. I’d like to know how to fixed it and not creating a vulnerability issue in my network.
    .
  2. Could you please explain and/or refer me to better understand how Nucleus One works as a streamer. What benefit it provides over a computer based server?
  3. How to download music files onto internal SSD I have installed on the device?
  4. Is RAAT technology equally utilized on devices that are Roon ready, Roon tested and Airplay?

Thank you,

Anatoli

10

Hello @ankrasko,

Thank you for the update — I’m glad to hear we’re making significant progress!

I wasn’t able to find your Marantz AVR in the list of Roon Tested or Roon Ready devices. Could you please share the exact model so we can verify its compatibility?

If you’d prefer not to use port forwarding due to security concerns, we recommend using the Tailscale VPN solution. It allows secure access to Roon ARC without exposing ports on your network. You can follow this guide:

The Nucleus One is a dedicated, fanless device designed specifically to run the Roon Core, the heart of the Roon ecosystem. Unlike a general-purpose computer, it’s optimized for silent operation, energy efficiency, and stability — no need to keep your PC powered on or allocate resources to background tasks. That said, in terms of music quality, both options deliver the same audio performance.

To use your internal SSD for music storage, you’ll first need to format it via the Web UI or using a direct HDMI connection to the Nucleus. Once formatted, the drive will be accessible as a network share via SMB. Here’s a short guide to walk you through the process:

RAAT is Roon’s proprietary streaming protocol, offering lossless, high-resolution audio streaming. It’s fully utilized by Roon Ready devices.

AirPlay, on the other hand, supports up to 44.1kHz/16-bit only — higher-resolution content is automatically downsampled. Also, note that grouping is limited to compatible protocols: RAAT zones can be grouped only with other RAAT zones, and AirPlay devices can only be grouped with other AirPlay devices.

Let me know if you have any further questions or if there’s anything else I can assist with.