Pro-Ject Stream Box S2 Ultra: Multiple Issues with Roon

I have the same issue with connection to Pro- Ject Stream Box s2 ultra as a bridge to ROON.
Each software update of streambox make only worse to functionality. With first update i loose Native DSD scenarion at ROON setings (only DoP setting in streambox enables ROON DSD options with some limitations). Then, with the last update of streambox to v 1.081 ROON stops recognizing streambox as a bridge at all. No responce from PRO-JECT AUDIO support. No password to ssh @volumio, as streambox uses oem of volumio software with some addons. So my personal advice to all the users of Stream Box to think twice before updating the software, as there is no possibility to return to previos version.

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@Leonid_Kravchuk does this help? Open streambox settings in Project app or via a browser. Choose Playback settings tab, re-choose your attached DAC, a black line is not enough, tap it so the line becomes grey, then Save. Check Roon again if it now finds Streambox. Perhaps restart streambox then check roon again.

I’m still on 1.071 and holding horses for now.

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Better to stick with that one, as streambox totaly closed for debugging)
i am allready like a voodoo runing here and there with streambox and different dacs (both SA KI RUBY, ifi idsd bl, and mytek liberty dac in my flat trying to catch the bug. Even tryed to compare log files with different versions. I also want to try with pc button, as you proposed above.
I will report here soon.

Thank you for support!


Seems I was on 1.079 on 2 different streamboxes, when pressing CHECK UPDATES it answers that I have already latest version, on both.
So I wonder how you got to 1.081 ?
Maybe they pulled it away after release?

The PC button trick does not always work. If the Streambox is set for the correct DAC as said in my previous post, the PC button might alleviate a temporal hickup.

The real pain is that when changing dac’s, the streambox software must be set manually to the new dac, in it’s settings. If not, roon won’t find it. Speaking of 1.079 and previous.


Sadly to report, neither of clicking in settings for DAC choosing did not help. Waiting new software to udate)

Hi everyone,

Thank you for the report here. The team will pull diagnostics here and investigate why the latest update is severing a reliable connection to Roon.

@Leonid_Kravchuk, would you mind providing the following details about your Core and network setup to augment our investigation?


Roon Core Machine

Include your operating system and machine info (Model, CPU, RAM):

Networking Gear & Setup Details

Your network gear (model of routers/switches) and if on WiFi/Ethernet:

Ditto, I’m on 1.079 and the device tells me that’s the latest version.

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Have you considered a factory reset?
Isn’t that rolling back the version too?
If so, then update to 1.079 since 1.081 seems to be gone.


Then FAQ at the bottom.

Dear @connor
Here it is

Roon Core Machine

Kernel: 6.0.2-arch1-1 arch: x86_64 bits: 64 compiler: gcc v: 12.2.0 Console: pty pts/3 DM:
1: LightDM v: 1.32.0 note: stopped 2: SDDM Distro: Ctlos Linux
Type: Desktop System: Gigabyte product: H610I DDR4 v: -CF serial:
Mobo: Gigabyte model: H610I DDR4 v: x.x serial: UEFI: American
Megatrends LLC. v: F4 date: 01/17/2022
Device-1: hidpp_battery_0 model: Logitech Wireless Keyboard serial: charge: 50%
(should be ignored) rechargeable: yes status: N/A
Info: 10-core (6-mt/4-st) model: 12th Gen Intel Core i5-12600K bits: 64 type: MST AMCP
smt: enabled arch: Alder Lake rev: 2 cache: L1: 864 KiB L2: 9.5 MiB L3: 20 MiB
Speed (MHz): avg: 2612 high: 3700 min/max: 800/4900:3600 cores: 1: 3700 2: 800 3: 800 4: 3700
5: 800 6: 3700 7: 3700 8: 3700 9: 3700 10: 3700 11: 3700 12: 3700 13: 800 14: 800 15: 3700
16: 800 bogomips: 118000

Networking Gear & Setup Details

Keenetic VIVA router kn-1910, linked with 5e ethernet PC and Stream box connected via ethernet cable with Stream Box S2 ultra

Connected Audio Devices

PRO-JECT Stream Box S2 ultra connected to DAC Marantz SA KI Ruby as a DAC via USB

Number of Tracks in Library

~10000 tracks

Description of Issue

After updating software on streambox s 2 ultra to v 1.081 Roon Bridge Streambox s 2 ultra nor connected DAC did NOT appear in Roon remotes.
og file link:

here is also a link to log with previous firmware 1.079 (works fine, except native dsd scenario (only DoP):

Thank you in advance!
Warm regards,
Leonid Kravchuk

Dear @Jurgen_S
Thank you for inviting specialists.

I did factory reset several times previosly,

unfortunatly, factory reset has no sense to firmware - it stays 1.081

Dear @Phil_Wright ,

here is the link to my log file with 1.081 firmare, it is not a joke - it exists)


Sorry, I wasn’t suggesting it was fictitious. :slight_smile: Just reinforcing that something odd is going on if you have downloaded it but we can’t see it.

I also have a S2 ultra - its on 1.079 released in July - the update button responds that this is the latest version and it works perfectly with Roon. When was 1.081 released?

is it firmware or system software that says 1.081 Leonid ? just want to clarify - I just looked at the log so please ignore my question.

On support when I have needed it - I am in the UK and was referred to Henly Audio who were very helpful but I think i was referred by project support in the first place

The system software of my Stream Box S2 Ultra is 1.079 from July 2022, too. And no update available - but if there will be one, I will stay here.

Luckily no issues with Roon.

Hi everyone,

Update here. The Roon Partners team has involved Pro-Ject directly and will provide any information we need from the Roon side.

By all indications, it’s a fix Pro-Ject will need to implement in their own firmware, as Roon’s interaction with this device has not changed with our most recent release. We will update you as we receive updates from their team.


Hi @Ciaran_Henry,

please look at my log files, and printscreen in the last message.
I mean, i am really uniq owner of 1.081 dated 6th of September 2022


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I see that Leonid - this is very strange - project must have made that release and pulled it and you were just unlucky to download while it was out there - between Roon and project we will find out. I just hope there is a way to rollback for you. Best - Ciaran

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Any success Leonid?
Have you contacted Project-Audio?
If not you might try to email them:
mod removed email address to prevent spam bots

Off topic but I’ve found it useful to bypass volume messing by Stream Box S2 ultra for the sake of sound quality.
Settings, playback options, volume options, set mixer type to NONE.