Problems with my PCM2702

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I have just soldered the digital connections to my PCM2702 but when I hook it up to my computers, all I get is "unknown device". What could be wrong? Am I correct when I assume you can just test the DAC with no analogue power supply?
 

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hmm.. still doesn't work. there doesn't seem to be many problems with this chip. almost every forum thread is just beautiful pictures from guys who made it work right away. i can not figure out what i've done wrong. apart from a bit fewer caps on the analog power supply side i have done exactly as the specs sheet suggest.
 
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