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[joe mama]

I just finished converting some APE files to OGG.  I noticed that the Replay Gain info of the APEs were transferred to the new OGGs.  So, I took a wav file and encoded it to APE (high) and then encoded the same wav to OGG (-q 7).  I imported them into MJ and ran Replay Gain.  They came out with slightly different values.

APE: -16.960  1.00
OGG: -16.990  1.00

While I'm pretty sure I won't be able to hear the difference between those two files, it makes me worry that the difference might be greater on other files or when converting to other formats.

Any thoughts?

Rob

[Matt]

You're running the Replay Gain on very different files (an original and a lossy approximation of the original), so the resulting value will be a little different.  It's normal.

Take care.

-Matt

[joe mama]

Right, I understand that the different formats will have different Replay Gain values.  What I was worried about was that when I converted an APE file to an OGG in MJ, the Replay Gain values that were set for the original APE were passed on to the resulting OGG.  Since there is the possibility that the Replay Gain values will be different for different compression formats, shouldn't the converted files undergo their own Replay Gain analyzation, or is the difference in the values always going to negligible, as in the example I gave.

Thanks,

Rob

[Matt]

Unless the lossy format is really bad, the volume shouldn't change enough for it to ever matter.  

And you could always re-analyze overnight to be safe.

-Matt

[joe mama]

Thanks Matt.

At first, I was gonna ask how you re-analyze files, but then I figured it out:  uncheck the box that says 'skip analyzed files'.