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Schiit Yggdrasil -- 21 bit?

Schiit says that Yggdrasil is a 21 bit DAC. But the DAC chips that they put in the device ( Analog Devices AD5791BRUZ, 2 per channel) are 20 bit with the error of plus-minus 0.5 LSB.

How can the DAC be 21 bit if the chips are 20 bit? Using two chips per channel does reduce the RMS voltage of the noise by  a square root of 2. But how can you get to 21 bit from there?

Can someone please explain.
defiantboomerang
gbmcleod
508 posts
 
A question for Yggdrasil owners: do you still use the stock power cord provided with the unit or have you substituted another cord? 

david_ten
5,480 posts
 
I substituted the power cord immediately. I also removed the very 'basic' footers. 
jayctoy's avatar
jayctoy
4,216 posts
 
Robert Harley is the one who reviewed the yagdrassil dac, he is a very good and accurate reviewer, for Absolute Sound....
gdhal's avatar
gdhal
1,641 posts
 
A question for Yggdrasil owners: do you still use the stock power cord provided with the unit or have you substituted another cord?
I'm using the stock power cord. 

I substituted the power cord immediately. I also removed the very 'basic' footers.
Hi David. Were you able to detect an audible difference with either the (ones you use in place of stock) cable or footer?

I'm sure you read the manual. The Yggdrasil has "zero stick-on feet (because Yggy already has screw-in feet—you’ve reached the big leagues now, guys)" 

Just a little humor :)
david_ten
5,480 posts
 
Yes on both counts. I was expecting the differential with the power cord, but I was more surprised at the improvement made when I swapped in footers which was after the power cord swap.

I've posted this elsewhere...the Yggy is designed to a price point and is exceptional at that price point...but the good/bad news is that it will respond to changes such as power cabling and isolation, etc.
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