ScreenFlow User Guide | Main Window : Properties — Audio Properties
| Audio Propertes These properties control the audible characteristics of a clip. These properties only affect the selected clips. All of these properties can be varied over time by using a Audio Action. Properties Volume Sets the volume of the selected clips. An Audio Action can be used to change the volume at different times during the clip. Ducking If checked, all other audio will be lowered by the given percentage while there is audible audio in this clip. In other words, if this is a narration track, background audio will be lowered in volume while the narrator speaks. Mute Audio If checked, the audio will be muted. Mix Input to Mono If checked, the exported audio will be mixed to mono. Effects Several Audio Effects can be applied to the audio track. Check the checkbox and select an effect to use.