I had written,
T> But there is no code or signal in S/PDIF that means "new track starts now."
Timothy Stockman responded,
S> I don't know how the CD subcode information is translated for S/PDIF
S> transmission, but the subcode "P" channel on the disc is just that, a "new
S> track starts now" signal. It is the CD's version of the "wide spiral
S> groove" between tracks on an LP. I've don'e know if the "P" channel makes
S> it into the S/PDIF data stream, but if it does, then the track start signal
S> 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.
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