Problems with UAD-1 card

[coplinger]

I am using a UAD-1 card with both Sony Vegas & Adobe Audition. Both apps are set up to compensate for latency. Here's my problem: When soloing or muting a track that is using a UAD plugin, when I un-solo or un-mute the track, it is no longer in sync with the rest of the tracks. This happens both in Vegas & Audition.

Another strange aspect to this is that there seems to be a point as I add UAD plugins that my computer's CPU gets taxed heavily, even though the UAD's CPU has plenty of headroom.

For example:
I have an 8 track project & am adding UAD plugins while watching the CPU on both the computer & the UAD. As I enable UAD plugins, the computer's CPU percentage moves up by a few percent each time until I hit a point where it jumps up by 50 or 60%! The UAD CPU is still only at 74%. I have tried changing the order in which I enable the plugins, but it doesn't seem to matter which track or which plugins are enabled first or last.

Then, when I mute a track with a plugin, my computers CPU drops back down to where it was. The odd thing is that when I un-mute the track, the computers CPU stays low, but now the track is out of sync. If I stop the track & play again, the CPU jumps back up high again.

I hope I explained this well enough. Any idea what is going on here?

My setup:
Pentium D 3.4 dual core
1 UAD-1 card
M-audio Delta 1010
DMA buffers set to 1024

 

[billybk1]

Ah, the ol' native CPU munching rearing it's ugly head again. It is directly related to how each particular DAW host app treats it's PDC (plugin delay compensation). Some do it better than others when it comes to using the UAD-1. Unfortunately for you, Adobe Audtion & Vegas are arguably two of the worst offenders and tend to be native CPU munching beasts. If you could turn off their PDC mechanisms you would see virtually NO extra native CPU usage. But, then all of your tracks would be out of sync.
Maybe someone else can chime in with specific tips for those DAW hosts. Myself, I gave up on Vegas many years ago, as a DAW host (still great for video editing though ) when SONY could not improve it's PDC, as related to native CPU munching and the use of DSP cards.

Cheers,

Billy Buck