So far, I’ve found MP3Gain to be somewhat conservative about adjusting the volume. I strongly recommend working on copies until you have got the settings you want, as I have managed to mess up a few MP3s while experimenting. That should reverse the changes by MP3Gain and return the file to its original state. If you’re not happy with the changes made by MP3Gain, just run mp3gain -u file.mp3. name *mp3 -exec mp3gain -a -k ĭepending on the size of your music collection, this may take some time. If you’re happy with MP3Gain’s adjustments, you could run it against your entire music collection using something like this:įind. If they sound good, then try a couple more. Now, pop the songs into your MP3 player again and give ’em a listen. To do this, run mp3gain -a -k *mp3 on the album, or mp3gain -r -k *mp3 for a single song. Make sure to listen to a bit of the songs with your favorite audio player so you can compare before and after.įor the first test, you might want to let MP3Gain try to automagically adjust the gain based on its analysis of the songs’ volume. I started with Concrete Blonde’s Bloodletting, which seemed to be a bit faint volume-wise when compared to other alternative rock albums. Once the software is installed, pick an album or song that’s a bit quiet compared to the rest of your collection and copy it to a directory where you can experiment. Then run make and make install to install the mp3gain command-line utility. Make an mp3gain directory, copy the zipfile to that directory, and unzip the source there. If not, grab the source from the download page. Your favorite distro may have a package for MP3Gain Ubuntu users, for example, can just run sudo apt-get install mp3gain to install MP3Gain. All MP3Gain does is tweak the file’s metadata to tell your MP3 player “turn this one up,” or “crank it down,” in an effort to achieve a consistent volume between songs and albums. The last thing you want to do after you’ve taken the time to encode several hundred CDs is to have to go back and do it again. MP3Gain does not re-encode the files or make any irreversible changes to your MP3’s audio data. Then, after analyzing the file, it can save information to the MP3’s metadata in the APEv2 format to Analysis and Undo tags about its analysis, and adjust the MP3’s gain setting directly so that the track is louder or softer. One way to iron out the differences is to use MP3Gain to adjust your MP3s to have the the same volume.Īccording to the MP3Gain site and documentation, MP3Gain does an analysis of each MP3 and tries to figure out how loud it sounds to the human ear. This difference carries over when you rip the CD to MP3, and can be really annoying when you’re going from song to song on your MP3 playlists on your computer or portable music player. Two CDs of the same genre, when played on the same CD player, at the same volume, can have drastically different playback volume. In conclusion, it's not just a ReplayGain that is applied, so I personally would stay away from any app of this kind except in very particular cases.If you listen to music on CD much, you’ll notice that some CDs sound much louder than others, and I’m not talking about Ministry’s The Mind is a Terrible Thing to Taste versus Sarah McLachlan’s Touch. In both cases, if you choose a target too high, you'll get clipping distortion. While the free one actually CONVERTS the file although it pretends not to (check with anything like Invisor Lite and you'll see that the "Writing library" changes), this one doesn't seems to, but it looks like it rewrites the actual audio content anyway (hence the very long time it takes.). Nevertheless, none of them are displaying a sensible value! They use a maximum target value of 100dB which absolutely makes no sense, as the maximum level of a digital audio file is 0dB. LUFS which is the loudness unit used in recording studios and broadcast) - which the free mp3gain app mentioned by wickedsp1d3r doesn't. I'm not interested in spending 15 bucks for this, but I want to enlighten potential users of the possible interest of such an app: this one deals with the loudness level of files according to current standards (i.e.
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