Removing DC Offset

From the Process menu, DC Offset to change the baseline of a sound file to compensate for electrical mismatches between your sound card and input device. Glitches and other unexpected results can occur when sound effects are applied to files that contain DC offsets.

TIP An easy way to spot DC offset is to zoom in to a silent section of your sound file. If the silent waveform matches the centerline in the waveform display, your file does not contain DC offset.

TIP For more information about using processing dialog controls, click here.

Automatically detect and remove DC offsetClosed

  1. From the Process menu, choose DC offset.

  2. Click the Automatically detect and remove radio button.

  3. Click the OK button.

TIP To speed processing, select the Compute DC offset from first 5 seconds only check box. Only the first five seconds of a sound file will be analyzed when measuring the DC offset. The only time that five seconds is not sufficient is if a long fade-in or mute has been applied at the beginning of the file.

Specify an offset valueClosed

  1. Determine the amount of DC offset in your file:

    1. From the Tools menu, choose Statistics.
    2. Record the values displayed in the Average value (DC offset) columns.
    3. Click the OK button.

  2. Click the Adjust DC offset by radio button and enter a value in the edit box to specify an offset value.

  3. Click the OK button

TIP To speed processing, select the Compute DC offset from first 5 seconds only check box. Only the first five seconds of a sound file will be analyzed when measuring the DC offset. The only time that five seconds is not sufficient is if a long fade-in or mute has been applied at the beginning of the file.