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Old 21st August 2009   #1
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Weird PT HD problem

Hey guys,

I just installed an HD1 Rig at home and I'm having a bit of an issue with the software. Here's the specs on the equipment to start:

PPC G5 Dual 2.3
5.5GB RAM
OS 10.4.11
Pro tools HD 7.4 cs8
Digi 192i/o
Waves and MCDSP plugs

We had been running an LE system at the house for a while as a secondary editing suite and sessions were fine. We noticed the other day when we went to do a mic shootout at our local studio that when the LE 7.4 session was opened with HD, there was massive delay in many tracks.

Even with delay compensation set to long, it wasn't helping at all.

This brings us to now, and I'm running into the same issue at home with this new HD1 rig. I'll load up a mix in HD that we did in LE, and things like drums, or anything with a send for that matter sounds out of phase and incredibly delayed (even with dly comp on).

As an example, I'll bus the drum tracks out to an aux to parallel compress, set my insert (could be any ... digi, MCDSP, Waves, anything), I'll bring up the compression into the drum mix and I get weird phaser type noises, not smooth compression. Same thing while parallel compressing guitars ... it's bizzarre.

Can someone point me in the right direction?

If you need any other info on settings and whatnot, please ask and I'll provide.

Thanks!
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Old 21st August 2009   #2
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turn delay compensation on in your track view so you can see the delay on the tracks. I bet there's some places that are too long for the compensation to handle. if some of the plugs opened as RTAS and they are on inserts after TDM plugins this will put your delay through the roof in a hurry.
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Old 21st August 2009   #3
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RTAS plugins tend to generate more latency on PTHD systems because of the architecture of the TDM system.

Go to the "View" window and make sure the delay compensation is visible in the mix window; there should be a display below the faders that shows each track's plug-in delay. If it's red, there is too much track delay and delay compensation won't work on that track.

This can be remedied by opening up each plug in and switching it from RTAS to TDM.
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Old 21st August 2009   #4
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Thank you both. Problem solved. One pesky RTAS plug under a bunch of TDM. As soon as I put the plugin delay view on (totally forgot about that) I was able to find the problem tracks ... then just reverse troubleshooted.

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