Inserts a noise in an audio file.

• Amplitude: An amplitude of noise in db, from -92 db to 0.
• Noise Type: 1- white noise, 2 - Gaussian noise.

If a section of an audio file is selected, then the noise will be inserted into the selected section. If no selection is made, the noise is inserted into the current cursor position.

The Amplitude = -92 is equal to least noise signal, Amplitude = 0 is equal to most noise signal.

Deletes silence from the selected part of an audio file.

• db Threshold: The threshold audio level in db. It varies from -92 to 0.
• Attack Time: The period of audio (in ms) below the given threshold before assuming the silence is started.
• Release Time: the period of audio (in ms) above the given threshold after it is determined to be the end of the silence.

If the audio period below the db Threshold is longer than the AttackTime, the beginning of that section will be considered as the beginning of silence.

If the audio period above the db Threshold is longer than the ReleaseTime, the beginning of that section will be considered as end of silence.

Silence Definition

For a very quiet high quality audio, the dbThreshold value is lower (ie. as -60dB). For noisier audio, the value is much higher (ie. -30dB).

If the audio above the specified threshold is more than the number of milliseconds specified, this audio section will be considered valid, and not silence. Use higher values for ReleaseTime to ignore short periods of audio (like clicks, static, or other noise). If this value is too high however (above 200ms), short words may be skipped.

Use lower values for AttackTime than ReleaseTime.

Inserts silence in an audio file.

• Millisec: Duration of silence in milliseconds.

If a section of an audio file is selected, then the silence will be inserted into the selected section. If no selection is made, the silence will be inserted into the current cursor position.