Something about USB

[stryker]

Quote:

Originally Posted by audioengr There's a fallacy in this. The "Junk" from the computer can still be there, even with USB to I2S conversion. Ground-loop noise and RFI from the computer can still affect an I2S interface. Design and implementation is critical.

Yeah, he knows all that stuff too.

 

[audioengr]

Quote:

Originally Posted by Clutz Technically speaking, how do they differ from each other? Is I2S a subset of the Left Justified format, such that any device that accepts Left Justified will accepted I2S, but a DAC that accepts I2S won't necessarily accept all Left Justified serial formats?

It's not a subset. The timing and signal polarity is different. There are several standards that are used with different DAC's
Left Justified
Right Justified
I2S
pulsed word clock

just to name a few. The MCLK is sometimes included and sometimes not, and it can be 128 fs or 256 fs.

The interface must be tailored for each one.

Steve N.