This IS the Avid L2: [Avid-L2] Re: John's bars question from the expert...

"If Sony had designed their decks with a true "clone" I/O
> port, Oliver's "adjusting the machine" syndrome would have been much
> more rare."

The composite digital "clone" out on the D2 machines was effected by the TBC settings which seemed like a recipe for disaster but I guess Sony felt the composite digital out of the D2 still needed to be adjustable. What we need it the good old dub cable from the 3/4 inch machines and beta then betasp. IIRC we could even dub cable out of beta decks right into the BVU-800s. Head wheel to Head wheel for 3/4 inch to 3/4 inch dubs IIRC.

--- In Avid-L2@yahoogroups.com, Wilson Chao <wilsonchao@...> wrote:
>
> I loved Digital Betacam, and was Sony's first customer for the format
> in New England. But it always bothered me that there was no way to
> make a true "clone" ie. a bit-for-bit copy, the way you could with a
> FireWire dub of a DV25 format like DV or DVCam. Instead, the Digital
> Betacam player pulled the compressed bitstream off tape, decompressed
> it (with error correction and/or error concealment) and spit out an
> SDI signal which was then re-compressed by the Digital Betacam
> recorder. If Sony had designed their decks with a true "clone" I/O
> port, Oliver's "adjusting the machine" syndrome would have been much
> more rare.
>
>
>
> On Wed, Aug 29, 2012 at 2:17 PM, oliverpetersvidy
> <oliverpeters@...> wrote:
> > > Terence Curren wrote:
> > > To be fair, the program on digibeta should never have
> > > to have any adjustments as it is digital. Just 1s and 0s. ....
> > > ...If the bars are incorrect on a digibeta, I too would
> > > be wondering where the errors were introduced into the chain.
> >
> > This is true and me, too, since I was the finishing editor on this series. As it turned out, the audio post facility was doing the final audio layback and then making an "air master" (digital copy) which was shipped to Discovery. I found out that the dub tech at the audio post facility was monitoring the DB edit master in composite and adjusting the machine to his scopes based on the bars when making the digital copy. He was in manual to do this, so this resulted in several IRE of difference on the copy (versus preset levels). The issue went away when I simply instructed him to leave the machine in preset when making the digital copy (aka "clone") and ignore what his composite scope said.
> >
> > - Oliver
>