Normalize

Choosing this command normalizes (adjusts the gain of) the audio file or selection to the decibel level shown in the Normalization Level field. There are two different methods you can use to normalize an audio file or selection: Peak (the default) or RMS (root mean square). If you choose the peak method, the highest peak in the file or selection is raised or lowered to the level you set, and the rest of the audio file is raised or lowered by the same amount. If you choose the RMS method, the average level in the file or selection is raised or lowered to the level you set. In general, use the peak method if you wish to set the loudest part of your selection to a particular value, and use RMS if you wish to set the average decibel level to a more consistent perceived volume. When you choose Process > Normalize, the level is set to 0 dB by default.

To set the normalization level
  1. Choose Process > Normalize.

    Figure. Normalize dialog.

    The Normalize dialog appears, showing the Peak Level and RMS Level of the selection.

  2. Choose the normalize method from the pop-up menu.

  3. Drag the Normalization Level slider or select the value in the Normalization Level field and type a new value.

  4. Click OK.

You can preview the audio file at the normalization level before closing the Normalize dialog. This makes it easy to set the level before normalizing the file.

To preview the file at the normalization level
  • In the Normalize dialog, select the Preview checkbox.