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Old 23rd January 2010, 07:16 PM   #1
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Location: Graham, TX
Default USB input for DAC

I'm new to DAC's and digital curcuits as a whole,but I am wanting to experiment a little,I have this curcuit that has both coax and optical input,but I want a USB input,what modifications do I need to make this possible?

Schematic is below.
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Old 24th January 2010, 12:53 AM   #2
wwenze is offline wwenze  Singapore
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Usually a PCM270x/PCM290x USB interface chip would be used, ideally the I2S-out of the 2706/7 connected directly to the DAC chip, but many implementation I've seen use the SPDIF-out of PCM2704 for easy source switching or just simply due to laziness.
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