L5730
Addicted to Fun and Learning
Some of you guys may be aware of my posts and other's in the Topping D10 review thread. It seems that this DAC, like many audio devices that get their [power from the USB Bus, suffer from some noise coming from the USB port itself.
From my own experience, plugging the DAC into a Raspberry Pi 3B (+5v PSU and Ethernet connected) dropped the noise considerably compared to any port on the PC. However, I think it can be lowered still.
One user was having a terrible time with noise, and so made their own solution:
Take a USB cable and cut the +5v (red) cable. Run an external +5v power supply into the device-side of the UBS cable red wire that has just been cut.
Take the ground (black) cable and splice into it the ground lead from the PSU. Do not break continuity of the ground lead in the USB cable.
This approach takes the +5v power from elsewhere, whilst leaving everything else connected.
There seems to be some devices knocking around the auction sites consisting of an ADUM chip and a small PCM board, with or without a barrel connector for external power. The spec. indicates that these are meant for the lower old USB v1 data speeds and not USB 2.0 480 mbps or USB 3.x.
I can appreciate my topic is a bit messy here, but it might be nice to try and compile a number of possible solutions that folks can try.
It might also be good to list devices that do and do not suffer from USB power noise.
How do the Bus powered audio interfaces fair with regards to USB noise?
EDIT:
Devices with clean USB power:
Raspberry Pi Model 3B
May have issues with current draw, but as along as it is USB spec. (<500mA) and nothing else it drawing much power then things should be fine.
Do be mindful of connecting HDMI devices as there could be a source of noise.
Ethernet connection seems to be free from carrying noise through a wired LAN via router.
(U:Create kit with Keyboard, Mouse, 2.5A PSU, Case etc. Plug n Play kit )
From my own experience, plugging the DAC into a Raspberry Pi 3B (+5v PSU and Ethernet connected) dropped the noise considerably compared to any port on the PC. However, I think it can be lowered still.
One user was having a terrible time with noise, and so made their own solution:
Take a USB cable and cut the +5v (red) cable. Run an external +5v power supply into the device-side of the UBS cable red wire that has just been cut.
Take the ground (black) cable and splice into it the ground lead from the PSU. Do not break continuity of the ground lead in the USB cable.
This approach takes the +5v power from elsewhere, whilst leaving everything else connected.
There seems to be some devices knocking around the auction sites consisting of an ADUM chip and a small PCM board, with or without a barrel connector for external power. The spec. indicates that these are meant for the lower old USB v1 data speeds and not USB 2.0 480 mbps or USB 3.x.
I can appreciate my topic is a bit messy here, but it might be nice to try and compile a number of possible solutions that folks can try.
It might also be good to list devices that do and do not suffer from USB power noise.
How do the Bus powered audio interfaces fair with regards to USB noise?
EDIT:
Devices with clean USB power:
Raspberry Pi Model 3B
May have issues with current draw, but as along as it is USB spec. (<500mA) and nothing else it drawing much power then things should be fine.
Do be mindful of connecting HDMI devices as there could be a source of noise.
Ethernet connection seems to be free from carrying noise through a wired LAN via router.
(U:Create kit with Keyboard, Mouse, 2.5A PSU, Case etc. Plug n Play kit )
Last edited: