two digitallish questions.

[danial stocks]

>
>
> >Perhaps put in extra words that get thrown out during normal playback and 
>do
> >not affect the D/A conversion, but show up raw on the spdif out and screw 
>up
> >the spdif receiever?
>Yes, putting in extra bits might be possible.
>I record those cd's via the analogue out of the cdpayer.
>This sounds a lot better.
>Maybe they just add an extra bit that gets ignored by straightforward DAC's
>but frustrates the spdif. As if they send in 18 bits resolution, but 
>'forget'
>to tell the dig out there doing so.
>The built in DAC is then converting the most significant bits,

the dac shouldnt clip... if the dac range is not 0000..00 to 111...11 then 
there is a excess s/n ratio that could be avoided.. effectively the number 
of bits in the dac is reduced if it clips anywhere in it's input range.. 
OTOH, if extra bits were added then maybe the clip is just in the always 11 
of the 2 msb or something like that?.. but I dont think that this is really 
what is happening... maybe you get got by the copy bit.. it causes this 
erroneous behaviour? copy bit remover would be good to try.. I read the 
SPDIF spec once and it didnt mention anything about extra data being made.. 
is the source-copy sample rate the same? that could cause a few probs..
Cheers,
Dan


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