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Understanding Foobar 2000's Replay Gain
EdPell
post Mar 27 2013, 16:45
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Using Win XP SP3 and Foobar2000 V1.2.3

I'm compiling a set of bedtime music files (FLAC) for my great-niece. Because her player does not play MP3s, I plan to burn a couple of standard CDs for her. I certainly don't want her to be suddenly jolted awake at 3am and then hate me for the rest of her life.

So I've been reading about the Replay Gain feature in Foobar2000. What confuses me in the Foobar manual is that it smooths out the audio level "... without physically changing the file itself".

That leads me to believe only certain players can read the replaygain values. If that's the case, then it seems to me the smoothing will be lost when I burn the CDs.

I must be missing or misunderstanding some key information. Can anyone shed some light on this for me?

Thanks
EdP
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EpicForever
post Apr 1 2013, 07:28
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I understand that it did what I was asking for, I know that. But I can't understand why album gain is changing when I simply copied tracks from the same album and make them appear in playlist twice? All audio properties remain the same - album peak should be the same, tracks peaks should be the same. I thought that if album peak remains unchanged, then the amount of volume change should be the same. And exaple of .cue file and referenced .flac is even more obvious representation of what I expected - that's just the same audio data - one time continuous, one time chopped into parts. But maximum audio peak should remain the same. But it looks like it wasn't detected as the same... Why?
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tedsmith
post Apr 1 2013, 07:56
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QUOTE (EpicForever @ Mar 31 2013, 23:28) *
I understand that it did what I was asking for, I know that. But I can't understand why album gain is changing when I simply copied tracks from the same album and make them appear in playlist twice? All audio properties remain the same - album peak should be the same, tracks peaks should be the same. I thought that if album peak remains unchanged, then the amount of volume change should be the same. And exaple of .cue file and referenced .flac is even more obvious representation of what I expected - that's just the same audio data - one time continuous, one time chopped into parts. But maximum audio peak should remain the same. But it looks like it wasn't detected as the same... Why?

I'm just guessing but since replay gain is calculated in blocks, the alignment of the blocks with reordered or duplicated tracks change (i.e. any track that isn't an exact multiple of the block size in length will offset the following tracks, at least that's my speculation and expectation.) This would change the album gain result.
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Posts in this topic
- EdPell   Understanding Foobar 2000's Replay Gain   Mar 27 2013, 16:45
- - Andreasvb   You can write the data to the files as well. And w...   Mar 27 2013, 16:58
- - db1989   QUOTE (EdPell @ Mar 27 2013, 15:45) What ...   Mar 27 2013, 17:05
- - trout   Good info in the previous replies. I hope nobody m...   Mar 27 2013, 17:51
- - EdPell   Thank you all for responding so quickly and thorou...   Mar 29 2013, 16:47
|- - db1989   Two ways to test: (1) Scan converted files for RG ...   Mar 29 2013, 16:56
|- - EdPell   >You canít show embedded data.< DUH ... tha...   Apr 1 2013, 14:59
- - EpicForever   Understanding of foobar's ReplayGain... Yes, t...   Mar 30 2013, 18:18
- - Andreasvb   1. Check the Properties tab, not Metadata. 2. It o...   Mar 30 2013, 18:23
- - yanni   QUOTE (EpicForever @ Mar 30 2013, 18:18) ...   Mar 30 2013, 18:37
- - EpicForever   Thx yanni and Andreasvb   Mar 30 2013, 18:43
- - EpicForever   Hmmm... I got one more question. What will foobar ...   Mar 30 2013, 20:56
- - Andreasvb   It will take Album if it has, else Track.   Mar 30 2013, 21:06
- - EpicForever   I got new question Here it is: I scanned my whole...   Mar 31 2013, 23:36
|- - garym   Album gain is a function of the other tracks, if a...   Mar 31 2013, 23:45
- - Andreasvb   It did what you asked it to, scan all files as sam...   Apr 1 2013, 00:32
- - EpicForever   I understand that it did what I was asking for, I ...   Apr 1 2013, 07:28
|- - tedsmith   QUOTE (EpicForever @ Mar 31 2013, 23:28) ...   Apr 1 2013, 07:56
- - 2Bdecided   QUOTE (EdPell @ Mar 27 2013, 15:45) it se...   Apr 2 2013, 00:31


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