Mic/Vocal recording delay in Logic 9

Question

Level 1

15 points

Mic/Vocal recording delay in Logic 9

Hi guys,
I seem to be getting a delay when recording vocals in Logic 9.

So when the vocals are recorded against the backing track they are out of sync even though the singer is singing in sync.

For example if i clap into the mic i can hear the clap in my headphones after i have clapped.

Any ideas? Or is it a Logic 9 bug?

Thanks

Posted on Aug 12, 2009 4:54 PM

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Answer 1

Zuelito

Level 4

1,515 points

Aug 12, 2009 5:44 PM in response to 45w35st

You need to lower the buffer size in the Audio Preferences. Try the lowest one you can go without getting pops or drop outs.

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Answer 2

cigame2

Level 3

548 points

Aug 13, 2009 1:50 AM in response to 45w35st

Open the Logic Pro Help from the Help menu and type "latency" in the top right field.
Then you can read all about this "bug".
Good luck!

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Answer 3

45w35st Author

Level 1

15 points

Aug 13, 2009 2:29 PM in response to cigame2

Hi tried the buffer size and Logic couldnt handle it.

The only thing that helped was using the low latency mode button on the transport bar. Is there some setting i can change in Logic so i dont have to keep using that mode?

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Answer 4

Zuelito

Level 4

1,515 points

Aug 13, 2009 8:57 PM in response to 45w35st

It's REALLY hard to diagnose any problem when you don't put the specs of your machine or hardware. Are you running a G4 Powerbook, or a Quadcore Mac Pro? Makes a HUGE difference.

And what latency did you try that Logic couldn't handle? Generally 128 or 256 are good enough to record to without too much latency, and shouldn't strain a fast machine.

If you have a fast machine and it can't handle a low buffer, then something else is wrong. Please give more info about your setup.

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Answer 5

robcog

Level 1

0 points

Aug 14, 2009 3:17 AM in response to 45w35st

All of the advice you are getting here is good. Turn off or freeze some of your tracks so you can use the lower latency settings.

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Answer 6

Aug 14, 2009 7:46 AM in response to 45w35st

Low Latency Mode button is your answer while recording. No ideas why you would not want to use it.

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Answer 7

45w35st Author

Level 1

15 points

Aug 14, 2009 6:40 PM in response to deepswing

The thing is Recording worked fine before i installed Logic 9.

I am using the latest unibody MBP 17" with an Apogee Duet, so computer spec should be upto it.

The track i am working on does have 31 seperate tracks with compressors eqs etc on each. Logic couldny handle 128 on the buffer, i normally use 256 which ran fine under Logic 8. Could it be the Apogee software not working so well with L9?

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Answer 8

triplets

Level 1

5 points

Aug 14, 2009 9:39 PM in response to 45w35st

Two things:
Bypass latency inducing plugins like Multipressor, Adaptive Limiter and Linear Phase EQ when recording.
Plugin Delay Compensation should be Off while recording.

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Answer 9

45w35st Author

Level 1

15 points

Aug 15, 2009 5:57 AM in response to triplets

Thanks,
im just thinking.....i have just installed a bunch of PSP plugins, could that be causing the problem.

I am not using them on the track in question though.

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Answer 10

Zuelito

Level 4

1,515 points

Aug 15, 2009 9:53 AM in response to 45w35st

Check out this article, it has some good information about the way in which Logic handles processing over multiple cores. It might be helpful.....

http://support.apple.com/kb/HT3161

im just thinking.....i have just installed a bunch of PSP plugins, could that be causing the problem.

Anytime you introduce new 3rd party plugs, and then your performance tanks, there is a good chance those have something to do with it. I'd take them all out of your project, then add them back in one at a time, and see if you can figure out which one is causing the problem.

Also, make sure the I/O Safety Buffer is UNCHECKED. With that on, it causes lots of performance problems and therefore you're going to set your buffer higher.

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