Audacity getting confused about compressed projects?

[Tid]

Compare these two files. One is a first generation Ogg file with quality setting 5. The other is a 7th generation file with quality setting 5 (each time).

Interesting. There's noticeable 'phasing' on the 7th generation, which is NOT what you get normally when you recompress an AAC or MP3. I have to admit though, I'm not familiar with the Ogg Vorbis algorithm, nor with the way Audacity applies it.

[Tid]

So the objective is to have two versions of each song project you which you can easily open to see the waveforms: 1) containing the two comparison tracks 2) containing the single track mixed down from both? And 1) is a compressed copy of a project?

I think that will work well, but you should close projects before copying them manually or Audacity may complain about orphan block files (files for the Undo/Redo mechanism) when you reopen the copied project.

But you will still get the PCM data in the compressed project once you open it.

Gale

More or less - the mixed down AAC is just to play people without necessarily having Audacity open; I can use the Mac's Preview software to play them. The Ogg Vorbis files are there only to see the waveforms in Audacity (and perhaps make a slight adjustment to Tempo or how well they synchronise).
As for the PCM data, I simply delete it (and all other copied data if I haven't made any changes) when I close the 'copy' project.

If I was using Audacity to write my own songs or otherwise create original music I would of course use it differently, and be unbothered about large project files and more concerned about audio quality.

[Tid]

If we went for behaviour 2) then I think it would be desirable to give compressed projects a separate extension to distinguish them from AUP.

Gale

Sounds cool. .ACP perhaps (if not used elsewhere?)

[waxcylinder]

I note that since Gale's last summary post, no voting has been requested.

So just what do we do with this thread? Just archive it?

Peter.

[Gale Andrews]

I note that since Gale's last summary post, no voting has been requested.

So just what do we do with this thread? Just archive it?

I have captured the votes/behaviours noted here, so I've archived it.


Gale