It probably means that linux kernel in use by euphony v2 does not have necessary drivers. Please consider trying euphony v3.

I have v3 version
I downloaded them today.
Can you add drivers for euphony, update or something that??

This is strange beacuse my friend playing with euphony and jcat and everyrhing is all right but he have difrent comverter

Can you please register for at least TRIAL so we can give you proper support?

Please tell me what i must do beacuse last year i have 30 days trial on my pc euphony 2.0 and now i try newest version euphony v3 but the new trial dont work
I was registred a new email and i have new trial code but when i put them to euphony i have error INVALID CODE

How did you install v3?

I downloaded and instal them to my pendrive today and put them to pc and run
When i start remote app in my phone there is write v3

There is to many options: youtube, qobuz itp
and sound is better

What can I activate TRIAL in Euphony v3 because i want that you give me proper support
Euphony is great program but jcat dont work. This USB card is the top at this moment and is very popular. Please fix this problem

Can you please try playing something on JCAT and then generate logs by holding CTRL and clicking Power Menu -> Restart WebApp. The file logs.tar.gz should be automatically generated and downloaded. Send it as attachment to zeljko.vranic@audiokernel.com.

For activating TRIAL go to Registration in main menu, folow external link to registration page, enter you info and in voucher field enter TRIAL. You will get registration code on your email. Copy it and paste it to first registration dialog.

OK, I checked logs after work.

I just got a response from jcat:

"Apparently there is a conflict between the NEC driver under linux and the hydra. Unfortunately, nothing can be done on the side of the JCAT card."

How did they concluded that? They had that problem before?

I dont know. I send email with my problem to jcat and they answered me like that.

I mean what info did you gave them? If you did not gave them any logs or system messages then they must be already familiar with the problem. I tried to google it but there is no any concrete info related to this problem mentioned anywhere...

My info to jcat:

Hello,
I play from PC and Euphony software (linux) and Euphony correct recognition of my converter Audiobyte Hydra X but music does not play.
When I connect to usb in the main pc without jcat everything works well.

What is the problem because a friend plays on euphony and everything is ok, he only has a different converter.
Can you fix it in the update for jcat usb?

Are you in a position to go to your friend and try your converter on his euphony installation?

We try this and doesnt work.
This is strange because i know other peoples and is that some devices work and others do not work.
My converter dont work with jcat but without jcat it is works.
My other friend have Mutek dac and it doesnt work with jcat and euphony, without jcat work well with euphony.

another friend has ifi dac and its works well with jcat and euphony.
etc.

This means that some devices work well with jcat+euphony and others do not work.
But the same devices work with euphony without jcat.

So JCAT support is probably right, it's not that euphony doesn't have a JCAT driver like I suggested in first reply, it's a conflict issue and those are hard to resolve...

I send you logs after work.

I holding ctrl when play music on jcat and click on restart app but nothing hapen
i dont know where this log is downloaded
Where i can find them ?

You generate logs from euphony web application. You hold CTRL while in the browser in the Euphony Web App and while holding CTRL click on Restart WebApp. logs.tar.gz file should be downloaded to your default browser download location.

OK, I try again after work.

You seem to have a lot of friends with euphony installed. Are they registered users? How long are they using it?

I have a lot of friends on the audiostereo forum.
In Poland, I was the first person who wrote about euphony on forums.
Now there are many more people who have appreciated the sound quality in euphony and we are discussing it in the forum.
An example of a link where there is a conversation.

Euphony (roon endpoint) + roon player is the best sound I ever heard in my system.

I was sended logs.

In the desktop app I have error in the screen when I go to options or when I try play the music. You see this in the screenshot.

Otherwise when I started euphony I see red inscription "FILED TO START LOAD KERNEL MODULES"

Euphony startup error - red inscription

screenshot

hmmm now I reboot euphony and I dont have error 400 but otherwise sound not play.

I believe that you can solve this problem.

This error during startup does not affect anything.
What about those logs?

I sended logs to you
Please check your email

I'll check it tomorrow morning.

Ok I will waiting.

I'm sorry but I was not able to find much.
There are two warnings that are suspicious but warnings usually mean it's nothing critical otherwise it would be an error, not just a warning:
Feb 28 17:26:41 euphony kernel: usb 5-1.1: Not enough bandwidth for altsetting 1
Feb 28 17:26:41 euphony kernel: usb 5-1.1: Warning! Unlikely big volume range (=32767), cval->res is probably wrong.
Feb 28 17:26:41 euphony kernel: usb 5-1.1: [10] FU [PCM Playback Volume] ch = 2, val = -32767/0/1

There are also some errors in playback process but they don't tell me much without raising log messages to higher level (and I'm not at all convinced it would help more).

I also don't know what do you expect me to do since this is not related directly to euphony but to linux in general. JCAT people should solve this if they care at all... Or the people responsible for Hydra...

Drivers for "jcat femto usb" and "audiobyte hydra x" are built into linux.
I dont understand this. If Euphony was builded on linux you can resolve this problem.

I want buy full version of Euphony but this must work properly.

So you think it's easy to fix driver code in linux kernel? I must disappoint you - it's not.
If more people complain about this we might be motivated to investigate but even then, it's not guaranteed we would get anywhere near solving it... Sorry.

OK, I understand, thanks for reply.
Now i must instal Windows Server 2012 R2 + Roon server.

Bye.

Hi,
I write to linux and intel and they can help resolve my problem.
Email form them:

"Feb 28 17:11:34 euphony kernel: xhci_hcd 0000:04:00.0: ERROR: unexpected command completion code 0x11.
Feb 28 17:11:34 euphony kernel: usb 5-1.1: Not enough bandwidth for altsetting 1

Completion code 0x11 (17) is parameter error, this means some value in
a context parameter is invalid.

Many of these context parameter are taken from the descriptors of the
attached usb device (device, interface, endpoint descriptors)

More details are needed, output of "lsusb -v", and dynamic debug of
xhci and usbcore would be a good start"

Where can i find this informations ?

Not sure about dynamic debug of xhci and usbcore but If you enable remote control on your euphony (CTRL+SHIFT+Restart Webapp) I can ssh into your euphony, issue lsusb -v and send you the output...

I see you are very determined to solve this somehow....
I just hope you understand that in order to really solve this we would need to establish proper test environment in which we can:
1) reproduce the issue
2) investigate it
3) hopefully find the source of the problem
4) patch kernel, recompile it and install it
5) check if problem is solved

In order to do that we would need to buy JCAT femto AND your model converter.
And this is just one combination of many (USB + converter) and it is not at all guaranteed that solution will work for other converters or other USB cards.
I don't know how big our business would need to be in order to make this endeavor profitable and ultimately reasonable...
Please understand our position.

Anyway, I will try to help you in small ways I can.

I enabled remote control

Sorry, I went home from work before you sent me the message. Can you enable it again now?

I work every day from 7-17:00
I can run a remote access tomorrow before work or today after 17:00

I can also run tomorrow before work and leave turned on for the day

You can turn it on after work, I'm sure I can find couple of minutes of time in the evening to connect, run the command and send you the output. I will close remote access behind me when I'm done.

OK

I enabled remote control

sorry for late ;(

I cannot connect. Remote control service is started but something prevents me from fully connecting. Not sure if it's some kind of firewall protection or something like that. Never encountered that before...

i have that message

antyvirus off, firewall off

You mean antivirus and firewall were off the whole time or?
Sorry, I didn't have the time later on to check again and now I see you turned it off.
I really don't know if this is related to you or it's a general problem, but it was working couple of days ago with different customer.
We can try again tomorrow.

Antyvirus and firewall was disabled whole time.

I dont know what is going on but now Euphony v3 dont work without jcat.
Euphony was still working the day before yesterday from mainboard USB of my PC.
Now dont work.

Can you send me logs?

I will send logs after 17:00

I was sended logs to you

Euphony dont show audio parametrs in the right corner

I don't see anything particularity wrong in logs besides you don't have any songs in queue. What is your exact problem now? You said at first that euphony does not work with JCAT, only on main board USB . Then you said "Euphony v3 dont work without jcat." Does that mean that euphony now works with JCAT but not with main board usb or it does not work either way?

Now dont work on USB in mainboard and jcat too.

Ok, but I did not see in logs that you tried to play anything.

Because I click play and it is not start. Check my last screenshot.
Signal is PCM 0/0

Now is exacly the same on USB in mainboard as Jcat femto

You click play but there is nothing in queue to play. At least that was in your logs.