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Originally Posted by HeadphoneAddict /img/forum/go_quote.gif
hotaudio, there are TI burr-brown chips that do USB to I2S. Was there a reason to go TI USB > S/PDIF before using another chip (DIR9001) for the I2S conversion? I'm just curious, not trying to bust your balls or anything.
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Of course there was a reason
I thought I would go with one of the most popular TI chips that had the USB to SPDIF function, that way in case somebody where to say, oh I don't know, maybe use a different version of windows say... then the DAC would still self install....
Basically to protect my DACs' shelf-life and usability between all the different OS'es out there....
Since I don't, and probably can't write my own drivers, I rely on the built in Windows drivers, which is probably a better idea anyways...
So going with the most popular CHIP just seemed like a good idea....
I had looked at TI's little USB to SPDIF chip and thought about using it as well...
I can't remember the number off hand, but it looked like a nice little unit
And of course TI also sells chips with built in USB to I2S functions as well, and they are very nice
But I just went with this option.
There are SO many options out there...
Oh yes, And I also wanted to use the DIR9001 chip, it is VERY expensive compared to the rest, but I'm pretty sure its' limited 'jitter' makes it worth the extra bucks...
I didn't really believe that "you" could hear a 20ppm difference in jitter, but I think I was wrong...
You VERY MUCH CAN hear the difference, and in another SPDIF ONLY DAC I make, it is even more pronounced as that particular DAC (which I can't name) has a 'wave shaper' or 'buffer' stage for the incoming SPDIF signal.
That buffer "squares up" the digital information before it is feed to the DIR9001....
And here AGAIN, you CAN hear the difference it makes.... just feeding the SPDIF to I2S converter nice clean square waves....
Who would have thought....
hotaudio40