Using Hiss Removal

The Hiss Removal feature removes hiss noise from audio clips.

To use Hiss Removal on audio, do this:

1.In step 1, do one of the following:
Select the first option and then select a range of the audio that only contains the hiss you want to remove, i.e. devoid of the audio you want to keep in the file. See Range Selection for more information on selecting a range of an audio file. Next, click the Analyze button to analyze the range of audio. Doing this creates a noise profile that CyberLink AudioDirector uses to remove the hiss.

Note: you can click the Hiss button to listen to the detected noise, if required.

Select the second option and then Select a preset from the drop-down. Select the preset that best fits the type of hiss (frequency) you are trying to remove.
2.If required, use the following sliders to further remove the hiss from the audio:
Noise level threshold: use this slider to manually set the minimum noise level. Anything that falls above this threshold level will be left untouched by hiss removal.
Reduction level: use this slider to set the amount of hiss removal applied.
Frequency smoothing: use the slider to recover any loss of quality (on the frequency range) that was caused by the hiss removal. Dragging the slider left will use more of the original audio, dragging to right will use more of the audio with the hiss removed.
Temporal smoothing: use the slider to recover any loss of quality (over the selected range of audio) that was caused by the hiss removal. Dragging the slider left will use more of the original audio, dragging to right will use more of the audio with the hiss removed.
Attenuation ratio: use this slider to set the amount of attenuation applied.
3.Click the Next button to go to step 2.
4.Select which range of audio you want to apply the hiss removal to by selecting one of the following:
Selected range only: select this option to only apply the hiss removal to the range of audio you selected and analyzed in step 1.
Entire audio content: select this option if you want to apply the hiss removal to the entire audio clip.
Select a different range: select this option to select a new range of audio where you want the his removal applied. This range can contain both the hiss and the audio content you want to keep.
5.If required, you can preview the repaired audio by selecting Restored result and then clicking the Preview button. Select Original audio if you want to play the original audio.

Note: click the Save as Preset button once you are done to save the Hiss Removal settings as a new preset. The next time you need to remove hiss noise from audio that was recorded in the same or similar environment, you can just select the preset from the drop-down in step 1.

6.Click Apply to repair the audio.