no volume control with usb dac

Hi,
I can’t controll the volume out of my usb dac. The dac worked totaly fine with volumio1.5. I tried different options in the settings with the UI, but allways no sound or sound without control. Has anybody an idea?

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 5: DAC [USB Audio DAC], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Disable the i2s DAC and retry

it is disabled, still no soundcontrol over the UI

Alsa still thinks it’s there according to your first post.

Some devices, even if alsa show a hardware mixer can’t be controlled with this mixer. I own a FDA fx audio 802 with a pcm hardware mixer, and even if you change value in volumio or alasmixer, no sound change. It​ seems to be due to alsa, not volumio.

for any reason, I really don’t know why, it works with the software-mixer. Before there was allways no sound.
thanks for help and the tipp with the mixer.