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In Reply to: RE: comparing I2S vs. AES3 with Gustard U12+X12 posted by motberg on September 30, 2016 at 01:14:19
I don't know how much merit there is to the argument but at least one manufacturer feels the need to add isolation on the I2S on their version of xmos USB to I2S.
Though I'm wondering if the goal is removing the nonideal electrical response of a poorly laid out i2s bus, then putting the isolation physically closer to the dac end of the cable rather than the processor end of the cable would be more optimal in dealing with emi problems related to the i2s cable and board traces electrical lengths and loop areas.
Follow Ups:
It is important to keep the I2S cable as short as possible. My HDMI cable is .3 meter
Alan
I can relate to this.My Viablue S-900 hdmi,which carries I2S between a U12 and an X12, is 4 meters long.It sounds like a quality cable-only that it is clearly attenuating highs above 8000 or 10000 cps.Resolution is affected(soundstage,etc.) sound has no "edge"-otherwise very similar to the AES3 cable,which seems to be quite good-D110 by DH labs terminated by Mark Tunis.Reading up on the subject of HDMI cables,I was aware only of the need not to surpass 5 meters,but was not aware of the need to keep the cable as short as possible.The trigger was pulled too early,as I was itching to compare the AES3 already in place with the I2S which most claimed to sound better than AES3.
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