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Help with MP3 Gain?, Lots of red
post Oct 11 2012, 10:47
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I'm new with MP3 Gain and I'm doing a track analysis right now with my music at 91.0 dB. This one causes the least red Ys under the clipping(Track) column. But most of my mp3s have red Ys under the 'clipping' column. How do I fix this? For some of the mp3s, they have a red Y under the clipping column no matter what dB i set it to.
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post Oct 11 2012, 19:49
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I'm new with MP3 Gain and I'm doing a track analysis right now with my music at 91.0 dB.
At 91dB, you are not giving MP3Gain much "room to work" without addtional clipping.

Peak levels don't correlate well with loudness, so you can have clipped files that don't sound loud. Obviously, you can't boost those files without more clipping. If you want to match the volumes of all your files (without clipping) some (most?) of your files will have to be made quieter.

f you don't care about clipping, you can use any dB setting you like and MP3Gain will match the volumes. But, if you want to prevent clipping you will have to use a lower setting and allow MP3Gain to reduce the volume on many (most?) of your files in order to make the volume (nearly) equal on all files.

If you use 91dB and configure MP3Gain to prevent clipping, MP3 gain will "do nothing" with much of your music. Any "quiet" songs that are currently clipping (or that are near clipping) won't be changed. However, louder-sounding songs (clipping or not) will be reduced as-usual to match your 91dB setting.

A higher target dB setting means there is more chance of needing to boost volume to hit your target volume. And as you boost volume, there is a greater chance of clipping. There is no perfect setting... 89dB is the default compromise that works with most files, and it will probably make most of your songs quieter.

I'm not saying you shouldn't use 91dB. I just want you to understand what MP3Gain is doing, and that there is a potential downside to going louder.

If you just want to make all of your files as loud as possible without clipping (and without any volume matching) you can normalize the files, which will set the peaks to 0dB. Of course, many (most) of your files are already normalized, so re-normalizing will do nothing. (The files may still show some slight clipping after MP3 encoding.)

Or as Dynamic suggested, you can use dynamic compression to boost the average level without boosting/clipping the waveform peaks. But, this reduces dynamic contrast and the constantly-loud music can get very boring!

This post has been edited by DVDdoug: Oct 11 2012, 20:10
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