Glitches, clicks, and pops when exporting all tracks as audio files

It's getting to crunch time, and Logic 9 has been giving me a very hard time. It's now time to export my edited tracks as mono audio files to send to a mixing engineer. I thought mono files would be a button press away. Not so.

*Background on Project*:

– Started in Logic 8, and was continued in Logic 9
– Contains only audio that was recorded using Logic
– Has take folders with Quick Swipe Comps
– Has flexed regions
– Has take folders with flexed regions in them
– Has been manually beat mapped

Steps:

1) Set each fader, on every track, to unity gain and centre panning.
2) File > Export > All Tracks as Audio Files
3) Select AIFF, 24-bit, bypass effect plug-ins, and include volume/pan automation, normalize off.

*Expected Outcome*:

I expect mono/stereo files of all of my unprocessed tracks, bounced in place with fades, flexing, and quick swipe comps applied.

*Actual Outcome*:

I get mono/stereo files with clicks, pops, and scrambled sections scattered throughout the files, within fades, and at quick swipe comping boundaries. Retrying the export may result in clicks, pops, and scrambled sections in different places.

Workaround:

While the glitching in fades and at comp boundaries seems to happen in offline bounces, it rarely happens when playing the song in realtime. Unfortunately, there's no realtime option when you "export all tracks as audio files." *My workaround is to export the tracks one at a time by bouncing the project in realtime with the desired track soloed*.

This is excruciatingly slow. To speed things up, I've taken to soloing six tracks at a time, assigning all of them to the surround output, and panning each track exclusively to a different surround channel. This way, I can do a split file surround bounce and get six mono files, each with the contents of a different track. If your audio interface does not support 6 outputs, then you'll need to download SoundFlower and use their virtual 16 channel output.

Logic 9.0.2, Mac OS X (10.6.2)

Posted on Dec 3, 2009 1:22 AM

Reply
4 replies

Dec 6, 2009 4:21 PM in response to Pancenter

In addition to the flex algorithms being disappointingly substandard in overall tc quality, flex tracks glitch constantly--especially if there are tempo changes or crossfades. You may be able to freeze them first and then export. AlternAtively, you could try tmelocking them and then using an alternate tempo map with a single tempo, then switching back after you flex tracks are bounced.

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Glitches, clicks, and pops when exporting all tracks as audio files

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