Noise Removal

Description and Usage

The noise removal effect can reduce constant background sounds such as humming sounds, small amounts of 'hiss', and buzzing sounds. It is not goopd for clicks and pops, or irregular background noise such as traffic sounds.

To use the effect you select some audio which is representative of only the noise. The effect profiles this, and it is sound that matches this profile which it tries to remove.

Parameters

• Get Noise Profile: The first step. The first audio you select should be only noise. Click this button when you have noise selected.
• Noise Reduction: The amount of noise reduction to apply. Small values usually work better. If you set this too large, the audio you want to keep is usually significantly affected too. It's generally better to reduce the backround noise a bit than to try to remove it completely.
• Frequency Smoothing: The larger this value the more that the effect considers different frequencies as 'the same'. If your noise is a single frequency such as mains hum or a high pitched whistle, then keep this value small. If your noise is more like a hiss, then a larger value will generally be better.
• Attack/decay time: How quickly noise removal reacts. Use a larger value if the background noise is pretty constant. Use a smaller value if it varies rapidly.