Fosi Audio DA-2120B, User Manual, Page: 12 / 16

7: No Dolby/DTS audio and I still get noise through the
USB input?
• Please switch the USB port to USB 3.0 or back USB port and try
again, as some USB ports have unstable data transmission;
• Please try again with another computer;
• Please replace the PC-USB cable and retest, contact me for
compensation if the original cable is faulty;
• Please change the power supply adaptation and retest, why?
Because of the ageing of the power supply there may be an
abnormal power supply resulting in white noise. I recommend
using the 9V-24V to power it.
8: USB Device not recognized on Windows?
• Computer sound setting: Select Start, then type device manager
in the Search box, and then select “Device Manager”.
Expand Universal Serial Bus controllers. Press and hold
(or right-click) the DA-2120B (Digital Hifi Audio) device and
select Uninstall.
Repeat for each device to uninstall.
Restart your computer.
Your USB controllers will automatically install.
• Please try another computer connection.
• Please try another USB 3.0 interface connection.
• Please try an alternative USB cable.
• Please unplug the USB flash drive, make sure no USB flash drive
plug into the amplifier.
9: Why do I get an intermittent sound?
• Please switch the USB cable to USB 3.0 port or back USB port
and try again, as some USB ports have unstable data
transmission;