How to Declick

  1. Open the file that you want to DeClick.
  2. Go to the restore menu and click on DeClick.
  3. When the DeClick dialogue box pops up you will see a number of settings:
    • Smoothing: This is a filter used to smooth/reconstruct the signal in the first stage of noise canceling procedure. Selecting greater values of the smoothing factor may result in a sound that is relatively clean, but muffled and dull. Un-checking the smoothing box will turn off smoothing. We recommend that you keep the smoothing at its default values until you are more familiar with how it works.
    • Postfiltering: Postfiltering is effective in reducing tape hiss and surface noise. It can provide considerable rates of noise suppression on silent parts in the recording, and still retain sharpness and freshness of the original sound in its louder parts where the noise is less audible. Un-checking the Postfiltering box will turn off Postfiltering. We recommend that you keep Postfiltering at its default values until you are familiar with how it works.
    • Outlier Detector: The outlier detector is a device used to localize impulsive disturbances throughout your sound file. Setting the detector at low values could cause the file to sound like there more clicks than before or make the music sound like it is clipping, because to low of a detection threshold would set off too many false alarms. On the other hand, when relatively large values of detection threshold are adopted, the detector may become to "tolerant" and fail to isolate small noise pulses. Un-checking the detection threshold will turn of the device. However, if smoothing and Postfiltering are unchecked as well then the resulting file will be identical to the original one.
    • Maximum Length of Detection Alarms: The maximum length of detection alarms, which can be chosen in the range <1,100>, determines the maximum number of samples in a row that can be scheduled for reconstruction in the automatic detection mode. We recommend you use the default value of 50.
  4. After you make the appropriate selections, you may want to change the name of the new file that will have the restored audio in it.
  5. To do this you can click on the change button at the bottom of the screen and save the file with the name of your choice.
  6. When you are done with making all of your sections you can click on the process button and the software will begin DeClicking your audio file.
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