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Download X-MP3Gain - Normalize the volume of MP3 files by album or track without any quality loss, apply batch processing, undo gain adjustments, and set thread priorities. Download MP3Gain Express 2.3.3 for Mac from our website for free. Our antivirus check shows that this Mac download is safe. MP3Gain Express for Mac lies within Audio & Video Tools, more precisely General. The latest version of MP3Gain Express is supported on Mac OS X 10.7 or later. This free software for Mac OS X was originally designed by Glen. MP3Gain, free and safe download. MP3Gain latest version: Equalise the volume across your mp3 files. MP3Gain is a handy, free (gpl) Windows software, t.

IMPROVE QUALITY OF ENTIRE AUDIO COLLECTION IN ONE CLICK

Download MP3Gain for free. Analyzes and adjusts the volume of MP3 files. MP3Gain analyzes and losslessly adjusts mp3 files to a specified target volume. It does not simply do peak amplitude normalization. MP3Gain does not just do peak normalization, as many normalizers do. Free software = download free, software and also open source code also known as FOSS (Free and Open Source Software). Mac = Mac download version. It works on 32-bit and 64-bit Mac OS.

MP3 Normalizer improves the sound of MP3 files, supports Peak and Loudness (EBU R128) Normalization methods and Automatic Volume Control for processing of speech records.

Simultaneously with normalization, MP3 Normalizer can apply Audio Effects, such as the Trimming of Silence, Fade-In, and Fade-Out for better playback.

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MP3 NORMALIZER IS AN IDEAL OPTION FOR:

There are just some common cases of using MP3 Normalizer. However, you can apply it for a much more comprehensive range of purposes.

INPUT FORMATS

MP3 Normalizer accepts .mp3 and .wav files. You will have a new MP3 file with an adjusted volume level and applied audio effects as an output.

Please note that if you would like to normalize audio files of other formats, you have to convert them to MP3 first. We recommend using To MP3 Converter for this purpose.

EASY AS ONE, TWO ...

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To normalize your MP3 files, you have to drop them in the application icon or window. The application will let you know when volume adjusting is done. MP3 Normalizer supports batch processing to process a single file or an entire tree of folders at one time.
Read More: Getting Started >>

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TRUE BATCH PROCESSING

MP3 Normalizer allows to adjust a volume of the unlimited number of files and folders in one click and supports multiple normalizations simultaneously. If you process an entire tree of folders, MP3 Normalizer will replicate the structure of source folders. It is especially convenient if you need to adjust the volume of the whole music collection.
Read More: Getting Started >>

'...batch normalize MP3 and WAV files in no time.'

- mac.softpedia.com

CUSTOMISABLE NORMALIZATION METHOD

By default, MP3 Normalizer analyses every audio track and applies the Peak Normalization algorithm with Target Level 0 dBFS. You can normalize either by Peak or Loudness (EBU R128) methods by choosing the required method in Preferences. To improve the quality of voice records - we recommend enabling Automatic Volume Control, which applies special processing of voice records.
Read More: Audio Effects and Volume Adjusting on Mac OS >>
Read More: Peak and Loudness (EBU R128) Normalization on Mac >>
Read More: Automatic Volume Control >>

AUTOMATIC OUTPUT SETTINGS

MP3 Normalizer estimates Bit Rate, Sample Rate, and Channels and applies optimal settings to output MP3s. As a result, it guarantees the best possible sound quality, saves your time and hard drive space.

If you would like to convert to a special Bit Rate, Channels, etc., change settings in the Preferences.
Read More: Preferences / MP3 Format >>

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*Note, we advise select Bitrate at 128 kbps, or lower meaning if you burn normalized MP3 files to CD and listen to it in your car. Some CD car players couldn’t read MP3 files with Bitrates higher than 128 kbps.

AUDIO EFFECTS

MP3 Normalizer can apply fade-in and fade-out; trim silence in the start and end of audio tracks automatically. To use the effects simultaneously with volume adjusting, just enable them in Preferences.

Read More: Audio Effects and Volume Adjusting on Mac OS >>
Read More: Automatic Volume Control >>
Read More: Trimming Silence and Noise Automatically >>
Read More: Fade-In & Fade-Out Audio Effects >>

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TAGS TRANSFER

MP3 Normalizer transfers all tags from source .mp3 or .wav file to normalized file. If you would like to check or modify tags after normalization, please, use the Tag Editor.
Read More: Preferences / Tags >>

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INTEGRATION WITH ITUNES

MP3 Normalizer allows exporting converted tracks to new or existing iTunes playlists quickly and easily.
Read More: Exporting converted files to iTunes >>

Just compare:

Your browser does not support the audio element. Quiet old audio

Your browser does not support the audio element. Same audio normalized to 0 dBFS

Your browser does not support the audio element. Audio Book

Your browser does not support the audio element. Audio Book normalized to 0 dBFS with Automatic Volume Control

Your browser does not support the audio element. Interview with a quiet segments

Your browser does not support the audio element. Same Interview normalized to 0 dBFS with Automatic Volume Control

Your browser does not support the audio element. Audio with clicks

Your browser does not support the audio element. Same Audio normalized to 0 dBFS with Automatic Volume Control

MP3GainExpress is a port of MP3Gain and AACGain to macOS. It allows you toanalyze or apply volume gain to a list of MP3 or AAC files. Anyone who has usedthe Windows UI for MP3Gain should find this one familiar, as itwas designed to look similar to that version.
It's easy to use. Simply select the files you want to increase ordecrease the volume of, enter the desired loudness, and click ApplyGain to update your files.
Disclaimer: If you are using this program for the first time, please remember to back up your files before trying to modify them with MP3Gain. While the application should work fine for most users, differences between machines could result in problems that only affect a small number of people.
Download:mp3gain_mac25.zip (6 MB)
Requires OS X 10.11 El Capitan or later. (Pictured running under macOS Sierra 10.12)

Last updated on February 9th 2021:
This release brings back AAC support which was accidentally omitted from the previous release.

Older version: mp3gain_mac234.zip (4.5 MB)
For OS X 10.7 Lion or later.

Questions and Answers

What is MP3Gain?
MP3Gain is a tool to increase or decrease the volume of MP3 fileswithout re-encoding them. This is useful when you have a lot of musicat different volumes, you can use this tool to make everything the samevolume so that you don't need to adjust the volume on your MP3 playerwhen listening to your music on shuffle.
What does MP3Gain Express do?
This version of MP3Gain does three things. It can:

1. Analyze MP3 files and write the volume information to a tagwithout changing the audio data itself. This is useful if you have aplayer that supports 'ReplayGain' tags. (Not iTunes or iPods, so mostlyuseless on Mac OS X)
2. Apply Gain to MP3 files. This updates the audio data in the filesto apply the new volume directly to them. This is done without re-encodingthe file, so there usually is no loss in audio quality compared tooriginal data. (I assume that if you make the file loud enough to start'clipping' that this would count as quality loss. The loudness ofdigital audio can be represented within a range of values, and once yougo above the maximum any points above the maximum can only berepresented as the maximum itself. If the 'Clipping' column shows Yesthen this situation is occurring. In some cases, depending on how loudyou go, you may not notice it. You can click the 'Prevent Clipping' checkbox to automatically use a lower value if clipping would occur.)
   
3. Undo changes applied to MP3 files, returning them to their original volume. This will only work if the file has previously had gain applied to it, and undo has not been performed on the file. The undo feature cannot remove file corruption in files that were accidentally damaged by the program.

What does MP3Gain Express not do?
MP3Gain Express omits some features of the original MP3Gain, hence'Express' tacked onto the name.

1. MP3Gain Express does not back up your files for you. As with anyapplication, there is a chance something could go wrong. If you'venever used the tool before, I suggest backing up your files first tomake sure it works as you intended.
2. Versions of Mac OS X older than 10.6 are not supported.
3. MP3Gain is for audio files only.The .mp4 extension allowed because some AAC files use that extension, butplease do not use it for processing video files. It will not work.

Over time, several missing features were added whichmay have made the original intention of the express name no longer necessary.However, the addition of multi-threaded processing made the application fasterthan the Windows front end, so now the express name may imply that it is fast.

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Why port MP3Gain to Mac again, eventhough a port already existed?
This port was made to fulfill one need that I had. I wanted to increasethe volume of a few tracks I had that were too quiet. I didn't need anyof the other features of the program, so they originally were not available in this port. Over time, more features were added as a result of user requests.I started this port a few weeks before Mac OS X 10.7 Lion wasreleased, and Bery Rinaldo's port had not been updated in over 3 yearsso I assumed it was dead. It also wasn't compatible with Snow Leopardat the time.
I decided to do my own port for two reasons:

1. The existing port was a front-end written in AppleScript. Anyonefamiliar with my previous work (MultiPatch for example) might be awarethat I prefer to call code natively and not use an external tool to dothe work. I felt that this could benefit from the increased flexibilityof a native application. This approach was eventually changed in version2.0 in order to implement multi-threaded processing, but the existingnative UI has been retained and the application should behave as it didwhen MP3Gain was integrated internally.
2. The existing port was bundled with PPC binary at that time, whichwould not work on Mac OS X Lion. My intention was to release the port aroundthe time Lion came out in order to fill that gap.

After I reached the point where it was partially working, it satuntouched for a few months. By the time I eventually came back to it,Bery had updated his version with Lion support. That version was alsoavailable for a number of years, but eventually disappeared from theinternet after its website went down. This port now has the missingfeatures and should be useful for people who formerly used that one.Disclaimer:I have not actually used his port, so my comparisons are based on the informationon his website.
Is there a build of the command-line version of MP3Gain available on macOS for power users?
Yes. I am now providing a command-line build of MP3Gain with AACGain support. This is the command-line version of AACGain 2.0.0 built for macOS 10.9 or later.It is based on the 2.0.0 fork from Github, refer to the source repository for exact revision used.You can download it here.
Will this port be actively maintainedand updated?
Probably not. MP3Gain itself isn't updated often anymore (Why would itbe? It already does what it was intended to do) and I primarily wrotethis for myself to use once every few years. If this program ever breaks in afuture version of macOS, I will probably update it just so that there'salways a working port available.
What is the license?
MP3Gain is LGPL. This port is also LGPL. You can probably find more information about that license on Wikipedia.
Who else contributed to this port?
The Spanish translation was provided by Emilio Pérez Egido.
The Greek translation was provided by George Leventidis.
The German translation was provided by Hans-Juergen Merkel.

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The Czech translation was provided by GVG.
The icons used in version 2.1 and later were created by George Leventidis.
There were also many users who emailed me with feedback and bug reports.
Where can I get the source code, report bugs, or request features?
There is a project on GitHub for MP3Gain Express where you can check out the current development code for the application, submit your own changes, bug reports, or feature requests. You can find it at https://github.com/Sappharad/mp3gainOSX/.
Contact
I can be contacted via e-mail at sappharad @ [same thingas before the @ symbol] .com.