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MP3Gain - Any reason to Album Gain higher than 83dB?
BFG
post Nov 12 2012, 05:01
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I'm planning to apply replaygain MP3Gain (album) to my entire set of ripped CDs. I know that the default setting for MP3Gain is 89dB, which gives around 14dB of headroom. But I've read up on some industry standards - notably, SMPTE RP 200:2002 and EBU R128 - which recommend 83dB and 80dB respectively. Furthermore, I tend not to listen to music at very high volumes - typically I never go over about 40% of max - and the Replaygain MP3Gain analysis shows I would have to go down to 82dB or lower to avoid all clipping.

So, is there any reason NOT to go down to 83dB or 80dB? Am I reducing the dynamic range of the music by doing so (i.e. could I be causing some sections of the music to have a 0dB volume)?

And, an associated question - what does a blue track with ??? for clipping indicate in ReplayGain MP3Gain? I can't find any documentation on this.

This post has been edited by greynol: Nov 13 2012, 01:07
Reason for edit: replaygain -> mp3gain
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greynol
post Nov 13 2012, 00:54
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I rip to flac and use foobar2000 to add RG information. From there I encode mp3s:
http://www.hydrogenaudio.org/forums/index....st&p=601287

To encode I drag the flacs onto a shortcut to the batch file that I keep on my desktop. Mp3s are created in the same folder.

I've been doing it this way for years without problems.

Instead of using a batch file, foobar2000 should be able to give the same result with minimal effort.

This post has been edited by greynol: Nov 13 2012, 01:04


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skamp
post Nov 13 2012, 11:11
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QUOTE (greynol @ Nov 13 2012, 00:54) *
I rip to flac and use foobar2000 to add RG information. From there I encode mp3s:
http://www.hydrogenaudio.org/forums/index....st&p=601287


TL;DR: Greynol computes a gain value from his FLAC's Replaygain album gain tag and uses it with LAME's --scale parameter. If I'm not mistaken, the formula is "10^(G/20)", where G is the Replaygain value in dB.
The downside compared to using MP3gain is that it's probably not (easily / losslessly) reversible.

This post has been edited by skamp: Nov 13 2012, 12:03


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