(Last Updated: February 22, 2019)

Overview of Audio Normalization

Suppose you have a group of audio objects at different volumes and you need to make them all play at the same volume. This problem can be deal with Audio Normalization from ActivePresenter 7. Basically, Audio Normalization is the application of a constant amount of gain to an audio recording in order to bring the average of peak amplitude to a target level (the norm).  It is an effective feature to level the sound out and gives you a consistent volume level. Besides, this is also helpful when you cannot speak at the same volume level in a recording session. Now, let’s learn more about how to use this feature in this tutorial.

Using Audio Normalization

Initially, if you want to use audio normalization to adjust the audio’s volume, you have to insert audio to your project. Thus, do as the guide below:

Step 1: Open the Annotations tab > Audio and select file from your computer to normalize. Note that you can add one or more audio objects/ ranges.

Open the Annotations tab > Audio and select file from your computer.

Step 2: Go to Timeline pane > Audio Normalization. Then, the Audio Normalization dialog will appear. Adjust the settings and click OK to normalize the selected sound.

Go to Timeline pane > Audio Normalization. Then, the Audio Normalization dialog will appear.

  • Remove DC offset: DC offset is an offsetting of a signal from zero. The problem can be seen from the waveform as it appears above or below the 0.0 horizontal line. In general, DC offset is mostly a hardware problem that can cause clicks, distortion, or loss of audio volume, which can limit the possible loudness. Hence, removing DC offset is required when normalizing audio as it centers the waveform on the 0.0 amplitude level. If you are sure your audio has no offset, you should clear this option to speed up the normalization.
  • Normalize maximum amplitude to (peak normalization): Peak normalization brings the highest peak to the norm. A level of -1 dB (the initial default setting) is just below the maximum amplitude (0 dB) possible without clipping, but gives a little headroom for effects and distortion-free playback on all equipment. For this option, enter zero or a negative value for the maximum amplitude you would like the selected track to have. A more negative value means you normalize the selected track to lower amplitudes.
  • Normalize stereo channels independently: Normalization can work on the left and right channels of a stereo track as a pair or independently. When you select this option, normalization adjusts the amplitude of the channels separately to the same peak level. Otherwise, when you don’t select this option, normalization adjusts the level of both channels by the same amount, which is practical if your audio is already balanced.

After adjusting, if they do not satisfy you, click Restore Defaults to go back to the original settings.

So, you’ve learnt how to use Audio Normalization in ActivePresenter 7. Hope that it helps.