How to prevent silence at beginning of bounced file

I am already positioning cycle locators and have the green bar at the top of the track screen. This is a very tiny addition of silence that only happens in bounce and never in export.

Bounce adds approximately 1/100 of a second of extra silence at the beginning of a bounced file. Export does not do this.

Lets say we have an audio or software instrument track of four measures. Through these four measures we have an organ note held throughout. Constant sound. Now lets use the scissors tool to cut the first and last measures so there is a single region of 2 measures in the center. We keep the two surrounding two single measure regions. If we play this in Logic pro you will hear a solid four measures of uninterrupted sound.

Now, lets put our locators and cycle button on so that those middle two measures would sound forever if we hit play. If we export this center region there is no silence added to the beginning of the file. If we bounce this section then silence will be added, approximately 1/100th of a second which is just enough to throw the timing noticeably off.

I don't want bounce adding extra silence to the beginning of a bounced file. I want to know how to stop it. Setting locators and activating cycle does not solve this; indeed, this is what I have been doing all along.

BTW, I always give a full two measures of music before where I want the other person to add their part so they have context. Still, the timing is off because of the added bit of silence in the bounced file when added to the other persons project.

When I go to the preferences if find:

Global > Cycle > Cycle Pre-Processing

I set this to "off" and "Smooth Cycle Algorithm" was already unchecked.

Same result, still adding about 1/100 of a second of extra silence to the beginning of the file. Good guess though!

I have already mentioned exporting a single track and explained that the extra unwanted silence is not in the exported track, only the bounced track.

The bounced file is already the exact size of the locators, say, precisely 2 measures. I don't understand the purpose of selecting an empty region along these lines.

Also, I have no idea what "PDC" is. Where do I find the setting for this? I am very willing to try but I cannot find it and it is not in the index of the Logic Pro 8 manual.

I have found a workable though not quite ideal solution. I can bounce as I have been and then create a new project, add just the one bounced file, zoom in all the way both horizontally and vertically in the track view, locate the first instance where the wave form varies one pixel, snip at that point, remove the region to the left of the snip to delete the silence, zoom out, move the remaining region all the way to the left and then export. This syncs perfectly when imported to another DAW.

The problem is, I can only do this with an uncompressed file, but that is not such a big deal because I would only want to do this with excerpts. So, problem solved by a workaround. Any suggestions to something more automatic and elegant are more than welcome.

Thanks for the help (and yelling),

Jim Gramze

More could be addressed here. I have noticed other audio editing software also adds silence to the beginning of files and it makes me suspect some part of the Macintosh OS as the culprit, such that if you call certain routines then you get this unwanted result.