Apple Final Cut Express HD - Manual (Page 646)

646 Part VIII Audio Mixing
Both echo and reverb filter settings are described below:
 Effect Mix: This slider determines how much of the “dry,” or original, sound from the
audio clip is mixed with the affected audio. By keyframing this parameter over time,
you can make it sound as if someone is walking from far away in a room (where
there would be more reverb) toward the microphone (where there would be less
reverb).
 Effect Level: This slider defines how loud the reverb or echo effect will be.
 Brightness: This slider affects the quality of the reverb or echo. Boosting this
parameter makes the effect seem more intense.
 Type: This pop-up menu (Reverb only) lets you specify the kind of acoustic
environment the filter will attempt to reproduce.
 Feedback: This slider (Echo only) affects how long the echoes produced by the filter
will last. As they repeat, they’ll interact with themselves to produce a complex series
of echo effects.
 Delay Time: This slider (Echo only) lets you determine the pause, in milliseconds,
between each echo. The longer the pause, the bigger the apparent space of
the environment.