If you wish to set a different db level, just change the both instances of the number "12" to whatever db level you would like to use. It is recursive as well, which makes it great for doing entire music collections or files in many subfolders. This script calculates the difference between the current db level and -12db, then applies a gain adjustment to put the gain at exactly -12db, which is what I've found works the best for me. Normalize-ogg -mp3 -bitrate "$3" -g "$gain_difference""db" -v "$line" Gain_difference=$(echo "$orig_gain"-12 | bc)Įcho "Gain Difference will be: $gain_difference""db" I've modified the script to use normalize-mp3 here so you can use it if you want: #!/bin/bashįind "$1" -iname "*.""$2" > $HOME/file_listĬat $HOME/file_list | while read line do Normalized file: 16._This_Protector.mp3: Audio file with ID3 version 2.3.0, contains: MPEG ADTS, layer III, v1, 192 kbps, 44.1 kHz, JntStereo Original file: 16._This_Protector.mp3: Audio file with ID3 version 2.3.0, contains: It fills in any missing codec data as well. Just create a file (name it whatever you want, I called mine db_adjust_mp3), chmod +x, and stick it in your ~/bin folder. It works for mp3, flac, and ogg input files, possibly others but definitely not wav.
You can view it here: Normalize-audio can't find mp3 decoderīasically my solution was the script in post #8. I was looking for exactly the same thing (only for ogg files) and started a thread at Crunchbang Forum. Referenceįor the sake of it, I'll throw my 2 cents in.
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Since only calculate/change replaygain value, is also faster: With an average PC (Intel i7-6500U, 8GB RAM) the rate was ~20 files/minute. -f, -force Recalculate Replay Gain even if the file already contains gain information.
Replay Gain is a proposed standard designed to solve the very problem of varying volumes across audio files. Two basic scripts exploiting these capabilities are shipped as well. This package provides a Python package to calculate the Replay Gain values of audio files and normalize the volume of those files according to the values.
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Install: pip install rgain3, then run replaygain as usual. Debian (Debian 12 Bookworm) and Ubuntu (Ubuntu 23.04 Lunar Lobster) releases will likely adopt PEP668 (PEP = Python Enhancement Proposal).
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Update 2023: There will be big changes in relation to pip. Update 2020: replaygain/rgain is currently not being developed, try rgain3, a modern fork. MP3-support is added to Sox with libsox-fmt-all: sudo apt install sox libsox-fmt-all Processed files will be saved in a new subdirectory "cleaned" in the original's path.įrom version > 14.3 we can use the sox filter -norm for normalizing audio on the command line or for batch processing: sox -norm infile outfile Several files can be selected from the file chooser that opens. Select the Chain we have just created and load all files you need with "Apply to files.". When done leave this window with OK to open "File -> Apply Chain.". Important: we always need to also add the effect "Export MP3" (or any other export format) for saving the resulting conversion to disk. Then choose the effect and it's parameters to insert to the chain (here shown for default values and the Normalize effect). In the now opening window press the Add button on the bottom left to insert a new chain (give it a sensible name): This is done with "File -> Edit Chains.". To do so we first have to define a "Chain" containing the effects we want to apply. With Audacity we can easily batch process files to apply conversions or effects to many files in a list. After that, you need to run sudo apt-get -f install to correct some dependencies issues. deb file for 14.04 (the latest) from here. Noted lately the binary file is replaygainĪlternatively, get the. To install python-rgain from the terminal, run the command sudo apt-get install python-rgain Also, it allows you to view existing Replay Gain information in any of those file types). Note: That package was removed on purpose on ubuntu 15.04.ĭebian proposes the python-rgain package as replacement (The advantage is that 'replaygain' supports several file formats, namely Ogg Vorbis, Flac, WavPack and MP3. There is no quality lost in the change because the program adjusts the mp3 file directly, without decoding and re-encoding. Instead, it does some statistical analysis to determine how loud the file actually sounds to the human ear. Mp3gain does not just do peak normalization, as many normalizers do.
Take a look mp3gain which for me is even better than normalize-audio mp3gain -r *.mp3Īnother useful version could be the -c which prevent to ask if you want to do the changes for many files: mp3gain -c -r *.mp3
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