HLLY USB SPDIF/ I2S CONVERTER - Page 2

kp93300 · 29th January 2012, 01:38 PM

Hi Felipe,
Thanks for the answer. Very helpful advice that I will follow. I want to keep the XO on the board.
SQ stands for sound quality.
I have tried different types of ground without avail.
kp93300

merlin el mago · 29th January 2012, 02:03 PM

You must keep the digital ground coming from USB.

SoNic_real_one · 29th January 2012, 02:55 PM

Definitely you have grounding issues. Messing with the regulators won't solve that.
You need an USB cable with all four wires, even if you use separated PS, just to connect the grounds (PC with receiver).
Use coax cable on SPDIF or shielded CAT5 if you use I2S (use the shield to connect grounds). You could also try normal CAT5E with one grounding wire taped close on it's surface.

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29th January 2012, 01:38 PM	#11
kp93300 diyAudio Member Join Date: Mar 2007	Hi Felipe, Thanks for the answer. Very helpful advice that I will follow. I want to keep the XO on the board. SQ stands for sound quality. I have tried different types of ground without avail. kp93300

29th January 2012, 02:03 PM	#12
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Blanes - Costa Brava	You must keep the digital ground coming from USB.

29th January 2012, 02:55 PM	#13
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	Definitely you have grounding issues. Messing with the regulators won't solve that. You need an USB cable with all four wires, even if you use separated PS, just to connect the grounds (PC with receiver). Use coax cable on SPDIF or shielded CAT5 if you use I2S (use the shield to connect grounds). You could also try normal CAT5E with one grounding wire taped close on it's surface.

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