Sync problem with export multiple

[pfeuh]

Hello,

I have a problem exporting multiple tracks, windows XP sp3 Audacity 2.0. The tracks are dragged and dropped tracks and recorded with Audacity tracks too. The recorded tracks have a compensed latency offset, you can see it with the symbol <- in the red circles. With previous version, a simple track/mix and Render on each recorded track before exporting resolved the problem. Now I can't export all the tracks, together, they are not synchronized! Did I missed domething?

regards,

Pfeuh

audacity_bad_sync.gif (47.42 KiB) Viewed 1745 times

[kozikowski]

I've never actually run into this, but Audacity does not export the blank spots you made with the Time Shift Tool. The time shift appears in the final show assuming you mixed the whole thing down to one track, but not if you export one single track.

I don't know that there is an easy way around this. Others may drop in.

I guess if you created a silence track under the skipped music track and married those two, then the music track silence would export along with the music.....

Koz

[steve]

Here's two alternative keyboard shortcut sequences:

Method 1:
Ctrl+A
J
Shift+K
Ctrl+T


Method 2:
J
Shift+K
Shift+Ctrl+K
Ctrl+T

Both methods select from time=0 to the end of the project in all tracks, and then trim to that selection.
Unfortunately there is no single operation to trim all tracks at time=0, though if you would like to suggest such a feature or some alternative way to export tracks starting at t=0, feel free to post your suggestion on this forum board: http://forum.audacityteam.org/viewforum.php?f=20

[Gale Andrews]

Is the latency correction adjusted to what you want anyway, with leading silence, even if trimmed to time zero ? See http://manual.audacityteam.org/o/man/latency_test.html if not.

Is the required feature request that Export Multiple has an option not to export before Time Zero?



Gale

[steve]

Is the required feature request that Export Multiple has an option not to export before Time Zero?

That would work for me.

[pfeuh]

Hello,

Wath a reactive forum, thanks for you answers, I'm going to work but I willl study them this evening.

The time shift appears in the final show assuming you mixed the whole thing down to one track, but not if you export one single track.

Just to be sure (I'm not english native speaker), the time shift is automatically done by this option in preferences and is mandatory for me:

audacity_latency.gif (42.17 KiB) Viewed 1734 times

Regards,

Pfeuh

[waxcylinder]

Is the required feature request that Export Multiple has an option not to export before Time Zero?

That would work for me.

And +1 from me

[pfeuh]

Hello,

I guess if you created a silence track under the skipped music track and married those two, then the music track silence would export along with the music.....Koz

If you mean mixing a shifted track and a non shifted track with Tracks/Mix and Render (I'm not sure of the exact words, I use a french version), I have checked it, it don't fix the problem, unfortunatly. But with older versions (like 1.3), it did.

See http://manual.audacityteam.org/o/man/latency_test.html if not.

I know the latency of my machine, it's near 130ms, due to an USB soundcard, I presume.

audacity_latency_measured.gif (59.62 KiB) Viewed 1721 times

Regards,

Pfeuh

[pfeuh]

Hello,

I have found a workaround. I have notice that if I create a new track (Ctrl-Shift-N) and copy paste in it a time shifted track, the symbol <- (for the time shift) diseapear in the new track, cool. But... I have to delete the latency manually before proceeding to "Export multiple". It works fine. The best should be that the "Export multiple" do this job itself. An other thing is missing in my opinion: Before proceeding, this option should put the volume of all tracks to 0db and the pan to center. And return to current values after exportation, to preserve the audacity mix, of course

audacity_workaround.gif (118.75 KiB) Viewed 1718 times

Regards,

Pfeuh

[steve]

An other thing is missing in my opinion: Before proceeding, this option should put the volume of all tracks to 0db and the pan to center. And return to current values after exportation, to preserve the audacity mix, of course

So in effect, export the unmodified audio data from the track rather than "post fader" export.
Yes I can see that being useful.