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How do I normalize an album?
post Jul 17 2013, 07:05
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Not as easy as you think! Greetings esteemed audio enthusiasts. I require your help!

I don't want to just normalize a bunch of tracks to 0dB - I want to permanently amplify an entire album by the same amount, so the highest peak of that album is 0db, yet ambient filler tracks and such are amplified to the same level so it all melds together smoothly.

Anyone know a simple and easy way to do this?

Mucho gracias! tongue.gif
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post Jul 17 2013, 09:04
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Are these files lossy (MP3/AAC) or lossless (WAV/FLAC/whatever)? If lossless, you can modify the volume of the files with negligible risk.

Some audio editors offer batch normalization. If you're limited to adjusting volume in one file at a time, you can put them all in one file, normalize, and split it back up again, as was suggested.

Or, for example, in foobar2000, you could ReplayGain-scan the tracks as an album, and make a note of the album peak value, but cancel so it doesn't write the ReplayGain tags. The peak will be a floating-point value probably between 0 and 1. To convert that value to dB FS, multiply its natural log ("ln" button on calculator) by 20. Invert the sign (so if you got -0.123 dB, pretend it's +0.123 dB), and apply that gain to all the files in your favorite audio editor. Run the ReplayGain scan again and the album peak should now be 1.0, aka 0 dB.
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