Only 7 plugins and audio stutters....

[zmix]

I cannot run more than 7 plugins on my UAD-1 card (4 mono and 3 stereo) before the audio becomes unstable and I need to freeze tracks.

This problem is not related to the UAD running out of resources or memory. It happens when the card is only running at 47%

I had this problem on my old G5 with a PCI-x bus.

I suspected that the PCI bus was at fault, so I upgraded my entire system to a Quad G5 with a PCIe bus and the problem is the same.

OSX 4.8
Logic Pro 7.2.3
Motu PCIe-424
UAD-1 PCIe 4.6

 

[Ashermusic]

I cannot run more than 7 plugins on my UAD-1 card (4 mono and 3 stereo) before the audio becomes unstable and I need to freeze tracks.

This problem is not related to the UAD running out of resources or memory. It happens when the card is only running at 47%

I had this problem on my old G5 with a PCI-x bus.

I suspected that the PCI bus was at fault, so I upgraded my entire system to a Quad G5 with a PCIe bus and the problem is the same.

OSX 4.8
Logic Pro 7.2.3
Motu PCIe-424
UAD-1 PCIe 4.6

Did you try raising the buffer size in Logic's Audio Hardware and Drivers panel?

 

[zmix]

I always keep my buffer at 1024, which is the highest setting.

 

[Ashermusic]

I always keep my buffer at 1024, which is the highest setting.

Well I am guessing the MOTU is at fault because I am not having this problem and I have 2 cards.

 

[zmix]

I always keep my buffer at 1024, which is the highest setting.

Well I am guessing the MOTU is at fault because I am not having this problem and I have 2 cards.

I can run 72 streams of I/O with my MOTU and never get any glitches.

I thought that PCIe was supposed to eliminate PCI bottlenecks!

 

[tony2007]

I cannot run more than 7 plugins on my UAD-1 card (4 mono and 3 stereo) before the audio becomes unstable and I need to freeze tracks.

This problem is not related to the UAD running out of resources or memory. It happens when the card is only running at 47%

I had this problem on my old G5 with a PCI-x bus.

I suspected that the PCI bus was at fault, so I upgraded my entire system to a Quad G5 with a PCIe bus and the problem is the same.

OSX 4.8
Logic Pro 7.2.3
Motu PCIe-424
UAD-1 PCIe 4.6

Same Problem here, Mac Pro Quad-Core, 2 UAD Cards (PCIe), OSX 4.9, Logic Pro 7.2.3., Apogee Symphony, AD16-X, DA16-X, running 57% of the UAD Cards...
Dosent matter wich Buffer i use.
EDIT
i tryed just now 1024, and the stuttering is gone...
but why i bought the Symphony Card???
somebody told me, dont run the symphony card over 256...

 

[macmusic78]

i have stuttering too when i max out my 3 cards - i guess its the pci bus... so i try not to go beond 80%

 

[PBenz]

Has anything changed?

I've been seriously thinking about getting a new Mac Pro and the Apogee Symphony system when I came across this thread, which is making me think twice. I unfortunately have one of those G5 PowerMacs with the AMD PCI chip that does not work that well with the UAD-1 card, along with a FireFace 800, and the latency issue is starting to get on my nerves. After reading the incredible Mix Magazine Field Test review of the Symphony system, I was gradually becoming sold, but if I will still have to change the buffer size to 1024 to avoid stuttering once I reach roughly 60% UAD usage, then what's the point? This is basically no different than what I'm experiencing right now!

Are you all still having these issues? Anybody else care to chime in?

 

[boody]

I think you should contact ua-support. Something isn't right.

goodluck
Budy

I cannot run more than 7 plugins on my UAD-1 card (4 mono and 3 stereo) before the audio becomes unstable and I need to freeze tracks.

This problem is not related to the UAD running out of resources or memory. It happens when the card is only running at 47%

I had this problem on my old G5 with a PCI-x bus.

I suspected that the PCI bus was at fault, so I upgraded my entire system to a Quad G5 with a PCIe bus and the problem is the same.

OSX 4.8
Logic Pro 7.2.3
Motu PCIe-424
UAD-1 PCIe 4.6

 

[JamesR]

did you clone / swap your system drive when you moved to the new system, or install everything from scratch on the new Quad G5?

it has to be your software installation as you can now eliminate the computer hardware itself, PCI bus method and uad card (you have changed all of them!) and everyone should be able to pretty much max out a single card, especially with a fast machine and buffers @ 1024.

(i can happily max out 4 cards in a 4-slot magma on a 2.0 non-amd g5.)

definitely call UA - they are *very* helpful...

J.

 

[harald-kiri]

Hi there,

i ran into problems with audio stutters and cpu spikes with my system, too. I tried to find a pattern for the stutters and they pretty often happend at the same places, at my system.

I found out, that they always happend, when Logic disables plugins on Audiotracks (not on Busses or Instruments, which are processed all the time). This disabling takes place around 1 sec after the region on the track ends and there is a gap to the next region. When i have a lot of regions on different tracks that end at the same i will get a dropout after 1 sec.
A silly workaround for me is to insert a region of very soft noise into the gaps in an audio track, which stops logic from disabling plugins and stops cpu spikes or dropouts.

I dont know if this is the same problem, that you have, but the behaviour is very repeatable and i would love to know, if UAJames knows anything about it

 

[boody]

Hi there,

i ran into problems with audio stutters and cpu spikes with my system, too. I tried to find a pattern for the stutters and they pretty often happend at the same places, at my system.

I found out, that they always happend, when Logic disables plugins on Audiotracks (not on Busses or Instruments, which are processed all the time). This disabling takes place around 1 sec after the region on the track ends and there is a gap to the next region. When i have a lot of regions on different tracks that end at the same i will get a dropout after 1 sec.
A silly workaround for me is to insert a region of very soft noise into the gaps in an audio track, which stops logic from disabling plugins and stops cpu spikes or dropouts.

I dont know if this is the same problem, that you have, but the behaviour is very repeatable and i would love to know, if UAJames knows anything about it

it's an ancient Logic problem you describe here. Cool efficient feature for native plugs but causing spikes in a full production specially with uad plugs.