|
|
Jeff asked,
| If I pass the optical OUT of a DAT through the optical IN of a Sony
| MDS-JE630, then I take the optical OUT of the Sony to another device by
| simply pressing the record button of the Sony with no disc inside, is the
| passed-through input signal one that has been ATRAC'd and de-ATRAC'd, or
| has it been left untouched?
That's been a source of debate. Most say that the ATRAC chip can't encode
and decode at the same time, so it has to be unchanged. Some say it must go
through ATRAC, because Sony wouldn't pass up an opportunity to degrade the
signal (yes, that was their argument).
All I can for sure is this: it does go through the sampling rate converter,
it does lose track number information, and it does get the source device code
changed from DAT to MD [well, lacking a DAT unit, I've tried it only with
CD sources, and the device code does get changed from CD to MD]. If there
is a disc in the MD deck and the deck is recording or is in record-pause,
track number information from the source is retained, the output of the MD
deck reports the source unit's device type, and if I understand the manuals
correctly [I don't have a digital source sampled at any rate other than 44.1
kHz and can't test it] the sampling rate is not converted. So I can say for
sure that monitoring with no disc inside causes changes that do not happen if
the deck is recording or is in record-pause.
Whether the signal is put through ATRAC in either situation, I can answer
only that it appears not to be.
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