Only extrem noise from DAC - Core -> allo usbridge (dietpi) -> DAC

Hello, (sry, I am very bad in writing english …)

I don’t know if i am right here, but I cry and need help …

I want my ALLO Usbrige use as Roon brige. The configuration with Roon should be fine, it works as roonbridge, but only with HDMI to my TV. If i choose the DAC to my speakers, there is always extrem noise, no music (with all mediafiles).

OS: Dietpi - fresh updated

Dietpi - Audio options - Soundcard = usb-dac
When i go into the ALSA-Mixer:

Card: NAD USB Audio
Chip: USB Mixer

in the middle of the screen:
“this sound device does not have any controls.”

F2: system information:
there is:
0 [atm7059link] : atm7059_link - atm7059_link
1 [Audio] : USB-Audio - NAD USB Audio
NAD Electronics NAD USB Audio at usb-aotg_hcd.1-1.1, full speed

the 0 have a ALSA-Mixer controllpanel, this should be the HDMI to my TV that works, but i need the 1, my DAC …

I don’t know what to do … isn’t my DAC supportet (but the system knows thats a NAD-dac…) ? Do I need anything else, any software?

My DAC is: NAD MDC DAC 2.0 ( )

Or need I a complet new DAC, if I want that it works? When yes, with witch ones should it work (150-1000 €)?

Thank you very mutch for all helpers … <3


I am having similar problems on an “ USBBridge” and an “Asus Tinkerboard” with an Audioquest Dragonfly RED USB dac both on dietpi v157

I am also using a Roon bridge, with the same settings as the original poster.

It detects the dragonfly fine, but playing anything results in extreme noise. I’ve tried different audio tracks from CD quality to 96/24

Thanks in advance,

root@usbbridge:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: atm7059link [atm7059_link], device 0: ATC2603C PCM atc2603c-dai-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: atm7059link [atm7059_link], device 1: HDMI PCM atm7059-hdmi-dai-1 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: atm7059link [atm7059_link], device 2: SPDIF PCM atm7059-spdif-dai-2 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: v10 [AudioQuest DragonFly Red v1.0], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0

root@usbbridge:~# systemctl status roonbridge -l
● roonbridge.service - Roon Bridge
Loaded: loaded (/etc/systemd/system/roonbridge.service; disabled; vendor preset: enabled)
Active: active (running) since Wed 2017-11-08 10:23:09 NZDT; 1h 8min ago
Main PID: 1533 (
CGroup: /system.slice/roonbridge.service
├─1533 /bin/sh /etc/roonbridge/
├─1537 RoonBridge --debug --gc=sgen --server RoonBridge.exe
├─2171 RoonBridgeHelper --debug --gc=sgen --server RoonBridgeHelper.exe
├─2199 /etc/roonbridge/Bridge/processreaper 2171
└─2368 RAATServer --debug --gc=sgen --server RAATServer.exe

Nov 08 10:23:09 usbbridge systemd[1]: Started Roon Bridge.
Nov 08 10:23:12 usbbridge[1533]: 00:00:00.017 Trace: [childprocess] using unix child process
Nov 08 10:23:12 usbbridge[1533]: Initializing
Nov 08 10:23:12 usbbridge[1533]: 00:00:00.645 Info: Starting /etc/roonbridge/Bridge/RoonBridgeHelper
Nov 08 10:23:12 usbbridge[1533]: 00:00:00.684 Info: ConnectOrStartAndWaitForExit RAATServer
Nov 08 10:23:12 usbbridge[1533]: Not Running (.o)
Nov 08 10:23:15 usbbridge[1533]: Running