How to change bitrate of MP3 files?
As usual, please feel free to skip the introduction.
MP3 is a popular audio format supported by the majority of modern multimedia
devices, including DVD players, portable players, mobile phones, and so on. It
is a 'lossy' format, which means that if you encode your music into this format,
some quality is inevitably lost. In exchange for this loss MP3 offers a very
attractive feature: small file size. MP3 files may be ten and more times smaller
than uncompressed WAV audio of the same length. Meanwhile quality losses are
rarely noticeable at decent bitrates.
Bitrate is a characteristic of MP3 files that defines how much space a
certain fragment of an audio can have for itself. Bitrate value is set when
encoding audio to MP3. It can be changed only by re-encoding.
Some people believe that by increasing bitrate of existing MP3 files they
produce files of better quality. This is not true. If you convert a file from
128 Kbit/s to 320 Kbit/s, the overall quality will become worse than at 128 Kbit/s!
So, if you convert from lower to higher bitrates, you end up with large files
and very poor sound.
Consider an analogy. You go out for a hike and need to take some things with
you. However, your backpack is pretty small, and a few things don't fit in.
Finally you decide to leave them and go out.
Now, even if you buy a bigger backpack somewhere on your way, there is no
chance to recover the things that you have left at home. You can only lose a few
more small things, when transferring them from the old backpack to the new one.
Of course, you can go back after getting a bigger backpack and put all
things into it. For audio files this means returning to the source (for example,
to the Audio CD) and getting a quality copy.
Another story is conversion from higher to lower bitrates. Here you don't
need all that quality and are ready to exchange some of it for smaller file size, so you are looking for
an MP3 resizer program to make your MP3 smaller.
This is perfectly okay and can be easily done with a bitrate changer tool like AudioConverter
Step 1: Download and install the program.
Download AudioConverter Studio to a known location. Run the downloaded
package and follow on-screen instructions to install the program.
Step 2: Start the program. Open a folder with MP3s to convert.
Launch AudioConverter Studio.
The program offers a user-friendly Wizard mode. You can follow hints of the
wizard to change bitrate of MP3 files. For our example, we will use the classic
mode, as it is quicker.
To follow our instructions, cancel or close the wizard. This will bring us to
the main window (classic mode):
Make sure that the "Files" tab is selected, then click the folder icon in the
address field. This will invoke a usual "Browse" dialog, where you can select
your folder with high-bitrate MP3 files. You can also type in the path directly
or navigate between folders in the explorer-like manner: double click a folder
to enter it, use the "Level up" button to leave the current folder.
Once you open the right folder, your MP3 files will be shown in the upper
part of the window. You can see their characteristics and other details.
Step 3: Set up MP3 bitrate and other parameters.
On the right pane, there are two areas. Let's take a look at the "Output
Select here the MP3 tab and adjust frequency, bitrate and mode parameter, as
Then go to the Tags and Filenames area:
We will use "Old filename", which means that converted files will have
exactly the same filenames. If your files contain some ID3 tags, you can rename
the files while converting.
From the "Using tags" dropdown list, select "Copy existing". This will copy
any tags your files might have to converted files.
Step 4: Select output folder. Change bitrate of your MP3 files.
Now all necessary preparations have been done.
Click the "Add all" button in the "Output files" area (highlighted on the
screenshot above (1)) to add all files from the current folder to the converting
list (the lower part of the window). Then choose a folder to save converted
files (files with the new bitrate). Attention: if you choose the input
folder, files won't be converted!
Finally, click the "Convert" button (2). Wait for the program to finish, then
get converted files in the output folder.
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