![]() So in the end, I just wanted to warn people before they "normalize" anything: if you're an audiophile, you probably don't use mp3 anyway -), if you're an average user, you probably won't notice any damage to songs that were converted correctly on the first place but reconverting an mp3 that has some click or other defect might increase them in a very noticeable way. In fact, I'm yet to find a converter that takes that into account and anticipates lowering the level BEFORE conversion of. Reducing the level should not be an issue, for that matter, but normalizing to 0dB is quite risky - I've seen intersample peaks of +3dB on very loud songs! Step: Download and install MP3Gain drag the target MP3 file into the software click Track Analysis type a value in Target 'Normal' Volume, up to 99db click Track Gain. But it will not degrade the audio quality. ![]() There's a lot to say about audio conversion, but one important (but neglected) thing is that any conversion can create so called "intersample peaks" thus creating distortion. MP3Gain is a MP3 volume normalizer that can analyze the target MP3 file and adjust each fragment to the similar volume. So the statement that it "improves the quality" of an mp3 is simply false - you could consider it "improves" the mp3 file itself by suiting your need for normalization or else, but not "the quality". Step 1 as you can see in ‘Red, it indicates that the file has gained volume levels previously. ![]() Then from it’s menu, go to: Modify Gain -> Undo Gain Changes. First locate the file or folder and load it to QMP3Gain’s main window. Hence the reason why I'm not making a proper review, if anyone prefers normalizing their files at the cost of a (probably) imperceptible degradation for them, let it be. How to Undo a previously gained volume level Quite simple actually. I've tested this app just enough to be sure it was actually "converting" the file and yes it does. It would not be so if there was a setting in the file's metadata like "play level" that you could change instantly, but AFAIK this doesn't exist. As an audio professional, I can't recommend an app that alters files in compressed format (mp3, aac, etc.) as any conversion to a lossy format implies modifications and artifacts and is not advisable.
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