servies;239038 Wrote: 
> Yeah, but then tell me how I should represent a bitstream with pure
> text...
> Ok, I'm getting creative...:
> signal A: __|--|_|--|__|--|_|-|_|--
> signal B: __|--|_|--|__|--|_|-|_|--
> 
> Sorry but I've never been very good in ascii art...
> So, where's the difference between the above signals?
> 
> 
> Been there, seen it, bought the t-shirt...

Servies, the thing you're missing here is that two types of information
are transmitted simultaneously by the S/PDIF stream - a string of 1's
and 0s, which is almost always transmitted flawlessly, and a clock
signal, which the DAC recovers using the transitions of the incoming
signal.  

When the edges are not perfectly sharp that recovered clock has minor
timing variations (called jitter).  If the DAC uses that reconstructed
clock for its D->A (which almost all DACs do), those slight timing
errors translate into distortion in the analogue output.


-- 
opaqueice
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