Operation Manual

Chapter 11: Sound effects and music 217
affects the vertical position of the volume adjustment
lines on all clips on the track, but does not change their
contour. Click on the knob and drag it with a clockwise
rotation (up to the 2 o’clock maximum position) to
increase the volume. Use a counterclockwise rotation
(down to the 6 o’clock minimum) to lower the volume.
Level knobs, full off (L), default (C) and full on (R).
The track’s relative level scale p, with its associated
fader q, are calibrated in decibels (dB). The 0 dB mark
corresponds to the level at which the clip was recorded.
Each increase of 3 dB doubles the perceived volume,
and each decrease of 3 dB halves it.
The position of the fader knob shows the volume level
at the current playback position in your movie, relative
to the level at which the current clip was recorded.
Drag the knob up or down to modify the level. The
knob is “grayed” (disabled) if there is no clip on the
track at the current time index. If the track is muted, the
knob is grayed and set to the bottom of its range.
Adjusting the fader results in a volume adjustment
handle being added to the track as described above.
A track’s playback volume contour, or envelope,
combines the overall track level with the relative level
at each point on the track. This combined level, which
is shown graphically by the volume adjustment lines on
audio clips, is applied to the actual audio data to
produce the track’s output level, as represented on the
level meter r, which illuminates during playback to
show the level at the current time index. To avoid
audio “clipping” – the unpleasant sound produced by
attempting to set volume levels outside the range of a