[music-dsp] Re: how to copy only once through SPDIF

[watt]

> There is only one copyright bit in AES-3/spdif/IEC958(?), I think watt
refers
> to the generation bit (as the second copyright bit). These two bits are
needed
> for SCMS (serial copy managment system), which was intended to allow a
(digital)
> copy of an original (e.g. a CD), but no further copies to be derived from
this
> copy.

    do you mean there is only bit in SPDIF and so i can not do only once
copy for SPDIF?
if can do one generation copy, where is the second bit for SCMS ? i do the
task about
SPDIF of sound card. i want to know this eagerly.


> IIRC: a) (!copyright) & (!generation) -> rec enable
>       b) (!copyright) &  (generation) -> rec enable
>       c)  (copyright) & (!generation) -> rec enable, but set generation
>       d)  (copyright) &  (generation) -> rec disable
>
> And on a Tascam Da30-MkII DAT machine you can set these two bits before
recording
> (at least I remember such a chapter in the manual of the machine).
>
> Michael
>
> --
> /* Michael Haertl */
>
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