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So many Mac Pro users here, but nobody with my prob?

C

Christian Baum

Member
Hi everyone,

I've had a problem with UAD-1 and UAD-1e for quite a while now (months) and have been in contact with UA who weren't able to reproduce any of this, not even when I sent them my very projects. Maybe someone here can try this:

- It occured on a G4 and a Mac Pro (UAD-1 and UAD-1e)
- An RME Fireface 800 was involved
- Logic 7.2.x (any version)
- I guess, the rest of the setup isn't important as it was quite different on the two machines.

When I use Roland Dimension D or CE-1 on a bus, I get very short crackles and drop outs in the course of the playback. Believe me, I tried everything, nothing helped (all the latency stuff, memory check, many or no other processes and apps running, much CPU load, few CPU load etc.).
The busses are triggered by audio tracks, instrument tracks or live inputs, whatever. As soon as I turn off the Roland plugs, everything's fine. Until then, EVERY single project I start ends up with these little noises. Usually, the even occur at the very same spots which is strange, too. They also occur quite often when live inputs from my hardware synths are involved and rarely when only softsynths and audio tracks are involved. The problem occurs from 40% UAD load onwards.

On the other hand, I can (with a benchmark song from a logic user site) play back 57 ES2 tracks and load my UAD-1e to 80% (inserts only) without getting any problems at all! So it's not the PCIe bus load either.

Can anyone reproduce this? Who has a Fireface with hardware live inputs and busses ith Roland plugs and can check this out? Is it the FF in combination with these plugs? But how come that this occurs on two totally different machines? I'm outta ideas... *sniff*

Best regards,

Christian
 
C

Christian Baum

Member
Here's an mp3 demo of one ot the noises. In this case, it always occured during these last few seconds of a song when an external synth was playing its final sweep... drove me mad! I had to bounce the whole sh*t and turn of any Roland plugs to get away with it... BTW, the plugs were NOT affecting *this* sweep track but others - and yet the noises occured, just because the plug was present *some*where!

http://www.bonsai-multimedia.de/mp3/knacks.mp3 (280 K)

Regards,

Christian
 
C

Christian Baum

Member
Sorry, really need to put this up again... 160 views on this thread and still no MacPro User with my Problem (which occured on my G4 with PCI as well).

PLEASE! Is there anybody using Dimension D and CE-1 in Busses??? Just yesterday, it happened again: No problem whatsoever until I put in a Dimension D in a bus, triggered via aux send by a live input - the crackles and dropouts started INSTANTLY and keep coming up at the same spots during playback.
It can't be true that nobody but me experienced this so far (on two entirely different machines, but both with RME Fireface), can it? The problem is so massive that working is hardly possible after using the first Dimension D...

*sniff*

Christian
 
TheHopiWay

TheHopiWay

Active Member
I use DimD on busses all the time but I'm using different host software.
In DP 5.1 no Problems, In PT 7.2 HD no problems.

I noticed in your last post you mentioned using a \"live\" input path.

What's the buffer set at in Logic?
UAD by it's own admission is a mixing tool and in many systems requires the host be at a largeish buffer (1024 is not uncommon) to work effectively.

Have you tried increasing the buffer and or recording the synth track and then running the mix?
 
F

F5D

Active Member
It seems that you have 3gigs of memory. I heard that the current Logic 7 version has problems with mac pro if you have more than 2 gigs of memory. Could this be the problem?
 
C

Christian Baum

Member
Hi,

thank you both for your input... Well, I tried everything, really! I set the strangest buffer sizes, I turned UAD's live mode on and off, I started or quit all background processes or apps I could get hold off, I restricted the Fireface to analog inputs only to keep the firewire bus from working overtime (ridiculous measure on such a machine-from-hell anyway) - it's always the same stupid thing, and it starts as soon as I use the Roland plugs on a bus. Of course, live inputs are always part of my projects because I have some hardware synths which play along and are mixed in in realtime.
But that was the same on my G4, and the problem occured there as well with the UAD PCI. However, it never occured as long as I used the RME Multiface (based on a PCI card). It started only when I got my Fireface 800 for the G4 and went on on the Mac Pro. Really strange, especially because UA wasn't able to reproduce this with the project I sent them, and so many people have got Firefaces and no problems.

Regarding the RAM size: 3 GB shouldn't be a problem: Logic, as all 32 bit apps do, can only address 2 GB of RAM. The 1 GB left is readily consumed by OS X and other apps started in the background. And on my G4, I only had 1.5 GB, and the problem still occured then.

Any other ideas?

Best regards,

Christian
 
C

Christian Baum

Member
Good question, never thought of that one... actually, I have an Alesis AI3 Adat-Interface hooked up to the Fireface. The Fireface never complains about missing sync or anything, but I could try to turn the AI3 off and see if it helps.

However, the question remains why I can easily avoid the problem by turning off the Roland plugs in busses...

I'm gonna play back my recent projects without the AI3 over the next few days and report back if I find something new.

Thanks for the idea, best regards,

Christian
 
C

Christian Baum

Member
Nope, no change... so it's not the clock sync.

I also tried projects by a friend of mine. I thought it could be me autoload song which has been transferred from several Logic versions to several machines over the years. However, my friend is a beginner and therefore used his original default song on a Macbook. After transferred to my Mac Pro, I started replacing plug-ins with UAD plugs. And there the crackling goes again! :-(

Although I'm not very much into alternative sequencer platforms, I'm gonna try to set up a realistic project in Live 6 and Cubase 4. Maybe it's the combination of Logic, Fireface and UAD... but then, there must be many people with this combi and no complaints are to be heard... strange...

Best regards,

Christian
 
S

styrmir

New Member
hi, i'm using mac pro - protools hd and i have a similar problem, but it has to do with more plugins, for example im having this problem with the pultec, both a an insert on an audio track and on an aux channel as well..
have you found out what the problem was?

best regards,
styrmir
 
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