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Old 22nd April 2010, 02:17 AM   #1
phrarod is offline phrarod  United States
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Default I2S direct to dac chip? World of hurt?

I have an audio note kit dac board. A friend is going to get some I2S modules and send me one which I could put directly into my dac. It will convert the USB or coax (not sure which at the moment) directly to I2S. Could I then go right into the audio note DAC chip conceivably and bypass everything else? As I understand it the receiver chip is to convert from SPDIF to I2S, right? Or am I looking at a world of hurt?
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Old 22nd April 2010, 09:50 AM   #2
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Originally Posted by phrarod View Post
As I understand it the receiver chip is to convert from SPDIF to I2S, right?
No such rule exists. I can't see anything on your circuit but you should simply use the dac datasheet and see if it is set to accept I2S.
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Old 22nd April 2010, 11:39 AM   #3
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That pic has a SPDIF receiver and a DAC. I think that what you need is a USB-i2s receiver, something like PCM2702... but your posting is confuse.
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Old 22nd April 2010, 04:47 PM   #4
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Originally Posted by SoNic_real_one View Post
but your posting is confuse.

Seems clear to me. He has a USB board which outputs I2S and hopes to snip the current inputs to the dac and hook the board. Question is whether the spdif receiver outputs I2S to the DAC and if not - how hard is to set the dac for I2S. A circuit will help.
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Old 22nd April 2010, 05:32 PM   #5
phrarod is offline phrarod  United States
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Analog - exactly!

Here's what a digital friend said. Now I have to figure out where to put the wires from the M2Tech which will take USB to I2S.

The AD1865 has 2 DACs with separate data paths. The good news is that the 74HC02 splits the data. You can remove U5(CS8414) and drive SDATA, SCK, and FSYNC from the I2S device.
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Old 23rd April 2010, 05:33 AM   #6
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And the bad news is that 1865 does not accept I2S directly.
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