First 5 seconds of Export buzzing

[kgagne]

Gale,

Thanks for your continued help!

What happens if you restart 2.0.5, open the project then export, without playing the project? Is the WAV still ticky?

Yes. If exporting a WAV is the first thing I do upon launching 2.0.5 and opening the project, the WAV will crackle, identically to the one in the ZIP archive I provided.

I'm not quite clear from the above whether you can ever export a ticky WAV from 2.0.5 after swapping track positions.

Sorry — these are a more test cases than I expected, and I'm having a bit of a time keeping track of them all.

After swapping the two tracks in 2.0.5, I cannot hear static or export a WAV that has static.

Can you try setting the second "Dither" setting (under High-quality Conversion) to "None" and then export from 2.0.5 without tracks swapped. That does not stop the crackle for me.

Following these instructions makes the crackle much, much worse for me.

-Ken

[Gale Andrews]

Thanks, Ken.

Could you try 2.0.2 again? I want to be clear in 2.0.2 if the export is crackly a) if you don't swap the track positions (b) if you do swap positions. Don't worry about whether you play the project before export or not.

Thanks,

Gale

[kgagne]

Gale,

If I drag the draft.aup file onto Audacity 2.0.2 and export a WAV as my very first action (no playback, no track swapping, etc.), then the WAV does indeed exhibit crackle.

-Ken

[Gale Andrews]

If I drag the draft.aup file onto Audacity 2.0.2 and export a WAV as my very first action (no playback, no track swapping, etc.), then the WAV does indeed exhibit crackle.

Thanks. And if you swap the track positions in 2.0.2, does the export crackle?

By the way, to make sure we are testing the same versions, do please Audacity > Quit Audacity before launching a different version of Audacity. If you have one version of Audacity running then launch a different version, all that happens is that a new window open in the version that is already running.


Gale

[kgagne]

No, it does not.

[Gale Andrews]

No, it does not.

Thanks, Ken. I just added a P.S. to my previous post to make sure you quit Audacity before launching a different Audacity version.

If that is what you are doing, then the picture is quite confused.

I don't have any export problem, just a playback crackle in the project in 2.0.3 onwards if I don't swap the tracks or fill white space with silence.

But you have an export and playback problem in 2.0.2 and 2.0.5 unless the tracks are swapped or white space filled, and have to go back to 1.3.13 to avoid that.

Can I post files exported from 2.0.2 and 2.0.5 for you to listen if they play crackly on your Mac?

I can hear the crackle on your exported WAV even on Windows.


Gale

[kgagne]

Gale,

Sure. And if I can provide additional Audacity or WAV files, LMK.

FYI, here are links to two podcasts I produced that had the crackle in the final version:

http://media.blubrry.com/openapple/p/ww ... OA-036.mp3

http://media.blubrry.com/thepubcast/p/w ... _Allen.mp3

The first was made earlier this month; the other is from November. Each had at least four tracks and was exported from whatever version of Audacity was the latest at the time.

-Ken

[kozikowski]

I have the draft zip. How do I tell if the Project starts before zero?
Koz

[Gale Andrews]

I have the draft zip. How do I tell if the Project starts before zero?

Thanks, Koz. "Before zero" is not a reported problem. The issue in Ken's project that causes playback problems is that the upper track's audio does not start at zero (if you zoom out you can see the first track does not start until about 10 minutes 20 seconds).

More generally, there are said to be problems playing at any point on the Timeline where not all the tracks have audio. But I rarely find that. In the subject project, the crackling at the start stops for Ken and I merely by moving the upper track down.


Gale

[kozikowski]

I can reproduce the problem — in either Audacity 2.0.3 or 2.0.5. Doesn't appear to make any difference.

I could have done with a test that didn't have crackles and pops as part of the performance.....

Just once I got a playback destroyed — digital garbage for the first second and then it straightened out.

The condition is very erratic. I can change the condition reliably by View > Fit Vertically or changing the track sizes manually. It seems to have track sizes it likes or not — and it's not repeatable.

I'll make a recording of the tests.

15" Macbook Pro
First Birthday 2013-01-24 although I had it long before that. I think it's listed as a 2012 MBP.
Mavericks 10.9.2
250GB SSD 102GB used
8GB hardware memory
Audacity 2.0.5 or 2.0.3

Koz