Radio sttaion mp3 gain how to#

The second method does alter your file, but because the underlying data is not modified it loses no quality, hence the adjustment can be done losslessly. Depending on the audio file format, the process may also be lossy in the sense that it could irreversibly push a signal above the format's maximum amplitude (resulting in clipping) or below the minimum (resulting in silence). For example, MP3 and AAC files can only be losslessly modified in 1.5 dB steps. Limitations of the audio file format may prevent precise (finely tuned) gain adjustments with this method. If no 'undo' info is saved somewhere, it may not be possible to restore the original audio data. In this scenario, only one type of ReplayGain (Track Gain or Album Gain) can be applied. In the audio data method, the file's actual audio data is modified so that its natural/default playback volume is at the target level. And there's no standard for where and how ReplayGain info is stored each implementation uses different formats and puts the info in different locations.

Radio sttaion mp3 gain how to#

Not all audio players/decoders know how to read and use ReplayGain information stored in metadata. If audio data was also changed, the metadata can contain 'undo' info. The volume-change information can be very precise.

In the metadata method, information on both types of ReplayGain (Track Gain and Album Gain) can be stored. Calculate the volume level and adjust a multiplier level in the mp3 data.Calculate the volume level of the file and add a new tag, letting compatible programs adjust volume on the fly.Mp3 volume level data can be adjusted losslessly, just as a JPEG picture can be losslessly rotated.

The technique is used by a number of programs and the levels are calculated by an algorithm called ReplayGain.