Previewing is a way of listening to how the current effect settings will sound without having to process the entire first. Preview Controls consist of a Play Play button and a Stop Stop button. When the Play button is pressed, previewing usually starts at the beginning of the selection. In some cases, such as effects that have time based , previewing will start at the current point's time rather than at the beginning of the selection.

In most cases, any changes in the effect settings while previewing are applied in real-time so you can hear the changes as they are made. For more complex effects and most based effects, the Update button must be used to update previewing with the changes.

The Update button is used only for previewing. It does not apply the effect to the sound. Use the OK button to process the file.