>T> But there is no code or signal in S/PDIF that means "new track
starts now."
>
>Timothy Stockman responded,
>
>> I don't know how the CD subcode information is translated for S/PDIF
>> transmission, but the subcode "P" channel on the disc is just that, a
"new
>> track starts now" signal. It is the CD's version of the "wide spiral
>> groove" between tracks on an LP. I've don'e know if the "P" channel
makes
.> it into the S/PDIF data stream, but if it does, then the track start
signal
>> is available.
>
>There have been discussions before about the subcode channels (though I
don't
>remember anyone's saying until you did now, Tim, that the very signal
needed
>is in the P-channel), and it seems that the only subcode that makes it
into
>S/PDIF is from the Q-channel. Recorders depend on changes in Q-channel
data
>that would imply a new track's starting. It's unfortunate, because if
S/PDIF
>carried that signal from the P-channel, track marking in digital
transfers
>would be rock-solid.
I'm runing my CD pla.yer in to my PC via a RME digi96 I/O board.
RME Supply a nice piece of software called digicheck,
using this to look at the "channel status" the "vality bit / CD-Subcode"
data clearly shows the Track number, index no. & time (to the nearest
second)
so the SPDIF signal must be carring track/time info.
--matt
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