Hi,
sorry for the late response. Btw. just switched to Fedora xfce now.
More Input:
Device - RME Fireface UFX
It seems to be recognized, when being plugged in into an USB-Port (Yellow LED). A blue would mean a USB 3 connection.
Now back to your question:
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: SoundBar [Dell AC511 USB SoundBar], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 3: HDMI 0 [DELL U2414H]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: HDMI_1 [HDA ATI HDMI], device 11: HDMI 5 [HDMI 5]
Subdevices: 1/1
Subdevice #0: subdevice #0
But when using: lsusb it's being listed atleast :
Bus 001 Device 004: ID 2a39:3f84 RME Fireface UFX III