MP3 Settings

MP3 settings includes the following fields:

Bitrate

Determines the number of bits per second. Bitrate may be set from 8kb/s to 320kb/s. The default value is set to 128kb/s. A larger bit rate will yield generally better-sounding (but larger) MP3 files.

Bitrate (BR) mode

Constant BR

This is the default encoding mode, and also the most basic. In this mode, the bitrate will be the same for the whole file. It means that each part of your mp3 file will be using the same number of bits. The musical passage beeing a difficult one to encode or an easy one, the encoder will use the same bitrate, so the quality of your mp3 is variable. Complex parts will be of a lower quality than the easiest ones. The main advantage is that the final files size won't change and can be accurately predicted.

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Average BR

In this mode, you choose the encoder will maintain an average bitrate while using higher bitrates for the parts of your music that need more bits. The result will be of higher quality than Constant Bitrate encoding but the average file size will remain predictible, so this mode is highly recommended over Constant Bitrate.

Variable BR

In this mode then encoder tries to maintain the given quality in the whole file by choosing the optimal number of bits to spend for each part of your music. The problem with Variable Bitrate is that some players or MP3 devices may not play them back as well as Constant Bitrate MP3 files. In this mode you can choose Min Bitrate (the minimum bit rate to use) and Max Bitrate (the maximum bit rate to use).

Bits

This option will add some bits to the encoded file.

Copyright

When enabled, it will set the copyright flag in the MP3 stream.

CRC

When enabled, it will add a cyclic redundancy check (CRC) code in each frame, allowing the decoding software to detect transmission errors that could occur on the MP3 stream. However, it takes 16 bits per frame that would otherwise be used for encoding, and therefore will slightly reduce the sound quality.

Original

When enabled, it will set the original flag in the MP3 stream.

Private

When enabled, it will set the private flag in the MP3 stream.