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When increasing or decreasing the volume of audio clips, you should consider the
following points:
• Normalize and 3dB Louder raise the noise floor; that is, while they increase
the volume of the signal, they also amplify the noise it contains. (This is true
when you raise the volume by other means, too.)
• 3dB Louder, if applied to a signal that is already fairly loud, may cause the
waveform to exceed the maximum amplitude and clip.
• Normalize, by raising the waveform amplitude to the maximum, puts the
signal in danger of being clipped if you subsequently apply a command or
effect that boosts the signal slightly. If this occurs, you may have to back up
and apply 3dB Quieter to the normalized signal before the other processing.
• Each application of 3dB Quieter erodes the signal structure slightly; you
cannot repeatedly apply 3dB Quieter, then use 3dB Louder to return to the
original waveform.
• Due to the nature and limitations of digital audio, the sum of all audio signals
played together cannot exceed the waveform amplitude limit. Even though no
individual clip is clipped, the combination may cause distortion.
If the selection contains any loud signals, Normalize may not seem to have any
effect. This is because the volume increase is determined by the loudest audio in
the selection. If an audio clip contains segments that are too quiet and others that
are loud, you should probably split off the quiet segments into separate clips and
then normalize those.
To Boost Audio Volume by Three Decibels
1. Select the audio data to be affected.
2. Choose Process-Audio-3dB Louder from the menu.
SONAR increases the volume of the selected audio by 3dB.
To Decrease Audio Volume by Three Decibels
1. Select the audio data to be affected.
2. Choose Process-Audio-3dB Quieter from the menu.
SONAR decreases the volume of the selected audio by 3dB.
To Normalize Audio Data
1. Select the audio data to be affected.
2. Choose Process-Audio-Normalize from the menu.
SONAR increases the volume of the selected audio to the maximum it can reach
without clipping.
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