Hi,
I had what I think was a ground loop with the following setup:
Power strip > raspberry pi 4 official USB psu > raspberry pi 4 > Motu M4
Same power strip > random USB charger > sound blasters G6 > line out (unbalanced) > Motu M4 (the signal reaches to the G6 via toslink optical)
Motu M4 > balanced > balanced amp
Why do I think it was a ground loop? Because if I power the G6 with a power bank the noise dissapears
Unfortunately i returned the Motu for a different reason unrelated to this but i want to order it again... if i am confident i can find a solution for the ground loop first
I know that I can solve the issue using a balance dac to the Motu, but this is not an economical viable solution for me now.
My questions are:
Would the ground loop dissappear if I power the G6 from the pi the Motu is connected?
I could not test this solution easily because for some reason when I plug the G6 to the pi it screws the pi configuration and I get no sound and I am not knowledgeable enough to make it work. However i could use a charge only usb cable if i find one so that the pi does not see the dac or even take a normal cable and cut the data wires (?)
What are the chances that this works?
Any other suggestions with the existing setup?
Thank you for your advice.
I had what I think was a ground loop with the following setup:
Power strip > raspberry pi 4 official USB psu > raspberry pi 4 > Motu M4
Same power strip > random USB charger > sound blasters G6 > line out (unbalanced) > Motu M4 (the signal reaches to the G6 via toslink optical)
Motu M4 > balanced > balanced amp
Why do I think it was a ground loop? Because if I power the G6 with a power bank the noise dissapears
Unfortunately i returned the Motu for a different reason unrelated to this but i want to order it again... if i am confident i can find a solution for the ground loop first
I know that I can solve the issue using a balance dac to the Motu, but this is not an economical viable solution for me now.
My questions are:
Would the ground loop dissappear if I power the G6 from the pi the Motu is connected?
I could not test this solution easily because for some reason when I plug the G6 to the pi it screws the pi configuration and I get no sound and I am not knowledgeable enough to make it work. However i could use a charge only usb cable if i find one so that the pi does not see the dac or even take a normal cable and cut the data wires (?)
What are the chances that this works?
Any other suggestions with the existing setup?
Thank you for your advice.
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