MP3Gain
MP3Gain is an open-source audio normalization tool for adjusting the volume of MP3 files. It analyzes the loudness of MP3s and adjusts their volume so all files play at the same loudness level without distorting the dynamic range.
mp3
audio
normalization
volume
MP3Gain: Open-Source Audio Normalization Tool
MP3Gain adjusts MP3 file volume for uniform loudness, preserving dynamic range without distortion.
What is MP3Gain?
MP3Gain is a free and open-source volume normalization program for MP3 audio files. It was created to adjust the playback volume of MP3s so that all songs in a music collection play at the same loudness level.
MP3Gain scans an MP3 file to detect its perceived loudness level based on psychoacoustic models of human hearing. It then calculates the amount of adjustment needed in decibels to reach a target loudness such as 89 or 95 dB. The actual audio data within the MP3 remains unchanged - MP3Gain simply tags the file with volume gain information to guide playback software.
This approach avoids deterioration in sound quality from traditional volume normalization methods that perform amplitude adjustments to the audio signal. MP3 playback software that supports replaygain reads this tagged data to dynamically apply volume adjustments during playback. This ensures consistent volume across files and albums without distorting dynamic range.
As an open-source tool, MP3Gain is free to use across Windows, Mac, and Linux platforms. It integrates with popular audio players through its replaygain support. Key features include batch processing of MP3 files, custom loudness target levels, and the ability to undo changes by resetting replaygain tags.
MP3Gain Features
Features
- Normalizes volume of MP3 files
- Adjusts volume without distorting dynamic range
- Open source software
- Command-line and GUI versions available
- Works on individual files or in batch mode
- Retains original MP3 quality
- Free and easy to use
Pricing
- Free
- Open Source
Pros
Makes all MP3s play at uniform volume
Avoids jarring volume differences between songs
Preserves dynamic range unlike simple volume normalization
Easy to install and use
Completely free with no ads or limitations
Works great in batch mode for large libraries
Cons
Setup can be tricky for command line version
GUI version is outdated and clunky
Limited to MP3 files only
Slower than simple volume normalization
Not ideal for streaming music libraries
Official Links
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