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With --replay-gain command vs. without

I noticed today that EAC's rips to FLAC are slightly different sizes depending on whether I used the --replay-gain command.

For instance, with --replay-gain, this one version of Last Kiss by Pearl Jam is 24,416,415 bytes whereas without it is 24,416,267 bytes.  After updating the Replay Gain tags with foobar2000, as far as I can tell, everything else is identical.

My questions are: one, is it normal for the file sizes to be slightly different?  And two, is one way preferred over another?  If so, what is it?

Thanks a ton for your help!

With --replay-gain command vs. without

Reply #1
If you know what replaygain is  (if not, you risk getting slapped for using a setting you don't know what it does), you should know that it needs to store several values.
Now, if you know that those values are written as text, that there are four, and that they are written in VorbisComment (IIRC!), you would understand why the different in size is around a hundred bytes.

With --replay-gain command vs. without

Reply #2
Thank you for the quick response!

Let me first apologize for being dense; I just want to clarify and make sure I understand this correctly.  The file size difference persists after I used foobar2000 to apply Replay Gain tags to both versions of the file even though the Replay Gain tags are identical.  (This might not have been made clear in the previous post.)  Does that mean there is a particular way flac.exe generates Replay Gain tags that carries over even after those tags are overwritten by foobar2000 to account for the slight size difference?

Thanks again!

With --replay-gain command vs. without

Reply #3
flac.exe --explain:

--replay-gain
...NOTE: this option may also leave a few extra bytes in the PADDING block.

So this can be the reason for filesize difference.

With --replay-gain command vs. without

Reply #4
I was referring to using flac.exe as the external compressor under EAC.

The extra padding block sounds reasonable.

Thanks again!

 
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