Fedora 39 DAC not working.

Bluetooth Products B50
1

Hi

I’ve been directed here from the Fedora forum. I have recently purchsed a B50, lovely little amp, I had hoped it would replace the soundbar on my desktop, but it doesn’t work in Fedora 39. It works fine in Windows and when using a Chromebook but I get the following error when attempting to use the B50 as an external DAC

[ 5186.489681] usb 1-7.1.3: new full-speed USB device number 14 using xhci_hcd
[ 5186.579942] usb 1-7.1.3: not running at top speed; connect to a high speed hub
[ 5186.586991] usb 1-7.1.3: New USB device found, idVendor=8888, idProduct=1717, bcdDevice= 1.00
[ 5186.587003] usb 1-7.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 5186.587007] usb 1-7.1.3: Product: Up2Stream USB Audio
[ 5186.587011] usb 1-7.1.3: Manufacturer: Arylic
[ 5186.587013] usb 1-7.1.3: SerialNumber: 2(redacted)
[ 5186.608949] usb 1-7.1.3: Warning! Unlikely big volume range (=4096), cval->res is probably wrong.
[ 5186.608959] usb 1-7.1.3: [2] FU [PCM Playback Volume] ch = 2, val = 0/4096/1
[ 5186.613430] input: Arylic Up2Stream USB Audio as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7.1/1-7.1.3/1-7.1.3:1.2/0003:8888:1717.000B/input/input30
[ 5186.665260] hid-generic 0003:8888:1717.000B: input,hidraw7: USB HID v2.01 Device [Arylic Up2Stream USB Audio] on usb-0000:00:14.0-7.1.3/input2
[ 5186.665467] usbhid 1-7.1.3:1.3: couldn’t find an input interrupt endpoint

Any help would be appreciated.
Thanks

2

seems the B50 has been recognized, and you could confirm with aplay -l, should see something like this:

card 2: Audio [Up2Stream USB Audio], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

And btw, in case you’ve missed, you need to select B50 as system audio output device.

3

Yes, it has been recognised but there is no sound when I select the output device

card 3: Audio [Up2Stream USB Audio], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0

4

That should be working. Did you check the volume? The B50 and PC have standalone volume.

I have no Fedora, but no problem on my Ubuntu. It should have no big difference. And you could try to send audio to device directly via ALSA: aplay /some/where/44.1k.wav -D hw:3,0

5

Alsamixer set to 0
face so red right now!
thanks for the hint!