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I did a bunch of these transfers years ago and found that the AES output of
the PCM 2700 fed my RME AES 32 card directly.
WRT the emphasis, none of these devices does the de-emphasis in the digital
domain. The PCM601 sends out whatever flag is encoded on the tape. We found
that a lot of people bypassed the Emphasis on the F1 record, but many did
not change the flag setting so the ape had the wrong flag. I still have a
couple of Lexicon LFI-10 format converters to deal with these oddball
tapes.
All the best,
-mark

On Mon, Jun 5, 2017 at 3:21 PM, Richard L. Hess <[log in to unmask]>
wrote:

> Hi, Ellis,
>
> My guess is that the DAT machine re-linearizes the audio before sending it
> out the SPDIF spigot. I think DAT machines also throw in the de-emphasis,
> but the ES-601 F1 system does not do that on its digital output but does on
> its analog output (I think), but that is an earlier design.
>
> Cheers,
>
> Richard
>
>
>
>
> On 2017-06-05 3:02 PM, Ellis Burman wrote:
>
>> Hi Eli.  Thanks for the update!
>>
>> So, just to clarify, you used the built-in S/PDIF optical input on the G5?
>> And the data was already re-linearized (there was some conjecture that the
>> data might need to be processed using a lookup table to remove the
>> non-linear encoding).  If the audio was re-linearized, then I assume it
>> was
>> 16 bit and you captured at 16 bit and not 12 bit?
>>
>> Did you find a method for 16 bit recordings that works reliably using a
>> DDS
>> drive?
>>
>> Thanks,
>>
>> Ellis Burman
>> www.audiomechanics.com
>>
>> --
> Richard L. Hess                   email: [log in to unmask]
> Aurora, Ontario, Canada                             647 479 2800
> http://www.richardhess.com/tape/contact.htm
> Quality tape transfers -- even from hard-to-play tapes.
>