iGain Menu

The iGain menu performs operations on the selected tracks or albums. It has the following items:

Analyze Each of the selected tracks or albums is analyzed to compute its volume. The result of the analysis is displayed in the Volume column and remembered in iGain's internal database. This operation only needs to be performed once for each audio file. Each time new files are added to iTunes, they should be analyzed in iGain.

If you adjust the gain of a single track, and then analyze an entire album containing that track, the results of the album analysis will be incorrect. For this reason, iGain will prompt you to undo any track adjustments prior to performing album analysis.
Apply Gain The results of the analysis is used to modify the volume of the selected tracks or albums. The gain adjustment is the difference between the track or album's current volume, as displayed in the volume column, and the target volume, rounded to the nearest multiple of 1.5dB. This difference is displayed in the Gain column. After the gain is applied, the displayed Volume will change, and the Gain will change to zero, indicating that no further adjustment is necessary.

If a track or album has not been analyzed, this will be done automatically prior to applying gain.
Apply Constant Gain This command allows you to change a track's volume by a specific amount. You may also use this command alter the balance of a stereo track by appying the gain to only one of the channels.
Analyze Selection as Album This command performs album analysis on the selected tracks. It should be used if the automatic computation of which tracks belong to which album is not correct.
Apply Album Gain to Selection This command applies the result of the Analyze Selection As Album command to the selected tracks. It should be used if the automatic computation of which tracks belong to which album is not correct.
Clear Data This command erases the analysis results from iGain's internal database. It should be used if the volume of the track or album's audio file(s) were modified outside of iGain. After using this command, the Analyze command should then be used to recompute the track or album's volume.

The Clear Data command does not alter the tags of the audio file(s).
Undo Gain Changes This command removes any previously applied gain changes from the selected tracks or albums, and restores them to their original volume.
Remove Tags This command removes tags from the selected tracks or albums. You will be prompted to undo any applied gain changes first. Warning: Removing tags without undoing gain changes will make it impossible to restore an audio file to its original state.