SSL, KONNEKTOR, HD I/Os, SYNC HD and External Clock

[Artur D'Assumpção]

Hi guys,

Maybe you guys could help me sorting out this post I did on the AVID DUC.

Just to give you the context. This is the setup I'm thinking to use for my SSL 6K using the KONNEKTOR to sync it to Pro Tools. I'm just trying to figure out how to configure everything and still take full advantage of the master house clock.

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Hi guys,

Sorry to post this on the HDX/HD forum but I didn't find any other suitable place to do it.

I have a setup of 3 HD I/Os and an Antelope OCX external clock serving as the master house clock. I will need to sync an external console to a LTC signal and for that reason I will need the SYNC HD to provide this signal. What's the best way to connect everything and at the same time take full advantage of the Antelope house clock?

- sync the HD I/Os and SYNC HD to external word clock and ignore the LOOP SYNC?

- sync the SYNC HD to external wordclock and the HD I/Os to the LOOP SYNC?

- any other configuration?
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I also have totally different possible setup which is to scrap the SYNC I/O and just use a SMPTE track on protools and connect it to the SMPTE Input on the SSL. The advantage of this is that it's much simple and cheaper, and the disadvantage is that I will burn one DA output and it is less practical.

Suggestions are welcome!

Thanks,

Artur

[StefanNowak]

Set the SYNC to external from the Antelope?

Then in PT, GEN MTC AND LTC in the transport window......

Stef.

[Artur D'Assumpção]

Hi Stefan,

And should I sync the HD I/Os through the LOOP SYNC with the SYNC HD?

This is the same reply I got on the DUC forum. Do you know if the phase lock of the SYNC HD is any good? I want to make sure that if i'm hooking the SYNC HD to my antelope, and everything to the SYNC HD, that I won't be having a poor signal when compared to using only the SYNC HD internal clock.

Cheers,

Artur

Set the SYNC to external from the Antelope?

Then in PT, GEN MTC AND LTC in the transport window......

Stef.

[Artur D'Assumpção]

Interesting paper on the subject, but with the oldie 192's

http://www.rcc.ryerson.ca/media/TECHNICALWHITEPAPERClockingJitterandtheDigidesign192IOAudioInterface.pdf

[sintech]

I'm doing this but with with: Apogee Bigben, Sync I/O and 4 192 I/O's

Check this out.. it's going to be a very similar concept.

http://www.apogeedigital.com/pdf/bigben_protools.pdf

[Artur D'Assumpção]

Thanks Sintech!

I was also thinking about that star topology configuration. It's not that practical on the PT side but it should yield better clock accuracy.

Anyway, I was thinking on locking the SYNC HD to the antelope and not the other way around like you have. I believe the PPLs on the SYNC HD and HD I/Os are the same (and better quality than the old ones) so they should perform as good as one another to lock on the antelope clock signal, which is better than the internal SYNC HD one. 

What do you think?

UPDATE:

The Antelope Isochrone OCX can't lock clock in. So it's only a master clock out! Anyways, I have on the Isochrone 2 clock outputs that are 1x/256x which is the protocol used by AVID for the clock in on the SYNC HD. the 256x is a super clock precision protocol.

I'm doing this but with with: Apogee Bigben, Sync I/O and 4 192 I/O's

Check this out.. it's going to be a very similar concept.

http://www.apogeedigital.com/pdf/bigben_protools.pdf

[sintech]

When I spoke to Apogee, they assured me that, the Big ben reshapes the clock to the 192's so I'm getting a better clock than the Sync HD. (otherwise it would be pointless)

Sync HD switches sample Rates Automatically


It has to be done avoiding the Loop Sync, and I have to switch every I/O to Wordclock in the session setup window.. for every individual session!

[Artur D'Assumpção]

When I spoke to Apogee, they assured me that, the Big ben reshapes the clock to the 192's so I'm getting a better clock than the Sync HD. (otherwise it would be pointless)

Sync HD switches sample Rates Automatically


It has to be done avoiding the Loop Sync, and I have to switch every I/O to Wordclock in the session setup window.. for every individual session!

UPDATE:

The Antelope Isochrone OCX can't lock clock in. So it's only a master clock out! Anyways, I have on the Isochrone 2 clock outputs that are 1x/256x which is the protocol used by AVID for the clock in on the SYNC HD. the 256x is a super clock precision protocol.

So I guess my only option is to use the same method, but the SYNC HD slaves to the Antelope OCX.

It should work best, since technology is now much better with PPMs (which are the weakest link).

[sintech]

All you want is the SMPTE from the Sync, and Konnektor will work without it. My Box is on it's way from Werner  so looking forward to seeing how it all rolls.

[Artur D'Assumpção]

Yeah the Konnektor will work if you stick an SMPTE audio track in your DAW and burn one output to input it to ssl.

I have to think about this, if it's worth to buy the SYNC HD or not, knowing that if you don't use it you'll be losing 1 DA output.

[sintech]

I did the SMPTE out of a single output when using the 2Tools Box, that worked great

[Artur D'Assumpção]

Yeah I might go that option and save 1400 euros!

I really have to see what will be my I/O usage since I'll have 48 DAs.

[waltzingbear]

used sync I/Os are a dime a dozen these days, but they still work with PT despite what avid says. They of course won't at some point in the future, but they are cheap and its an easy way to get rolling til that day. If you don't update your PT all the time anyway, well then it could be a long time til then.

Alan