Ask support.
Seems none mentionned this article.
One USB-C end offers Power Only and the other one DATA Only…
Have you checked which one is concerned ?
Cheers
I see, thanks Gianluca for the pic.
3 “units” concerned : 1 DC 5Vdc - 1 USB-C Female DATA - 1 USB-C Male Power.
What kind of PSU is connected to the splitter ? Cheap DC phone charger >=5Vdc ?
Maybe the AC/DC brickwall adapter is noisy…
But when all components are power on, and I listen noise, If manual unplug only khadas power, and after few seconds, plug again +5 volt to khadas, the sound is good.
I use Volumio software + raspberry pi3+ tone board.
1- disconnect DAC from power wire
2- power on supply only for raspberry ( I wait until the software Volumio loaded on raspberry)
3-plug manually power to khadas,.from same power supply
In this mode sounds is good
In other way, when power on DAC and raspberry simultaneously, with the same power supply , I have high distortion
Hi Gianluca,
Seems you’ve got the right way to get good sound.
During computer/SOC/NUC startup, all power sources are stressed, changing state. (Power Good)
While RPi boots, USB port connected is not “ready to synchronise” with TB = distortion.
TB unpluged + plugged back again = good sound (USB sync OK)
That’s what you’re explaining, view from my seat
Gouwa gives some good hints concerning USB.
Enjoy !