Fade In And Fade Out; Envelope Active - Mackie HDR24 Editing Manual

Fade In and Fade Out

Fades, both Fade In and Fade Out, are tools that ramp the region volume from
zero amplitude up to unity gain amplitude (Fade In) or from unity gain down to
zero (Fade Out). Any time the fade length is greater than zero, the associated end
portion of the region (start, end, or both) will be displayed in the track area with a
different background color. This is the area over which the fade takes place. A red
line through that fade region represents the relative change in amplitude within
the fade region. The amplitude of the waveform follows the fade curve.
Editor window and editing the Fade time fields.
Obviously a fade time cannot be longer than the total region length, however a
fade can extend over the full length of the region. Fade In and Fade Out interact,
however, and one will push the other over to make room if they begin to overlap.
There are three selectable fade curves, which determine the rate of change of
volume over the fade time - slow, linear and fast. Your ears will tell you which one
works best for the application. Adjusting fades is best done interactively – listen,
adjust, listen again. You may find it convenient to set up a loop around the fade
region so that you can fine tune while listening.

Envelope Active

The Envelope ACTIVE button enables the volume changes you have made with
the Node tool. When Envelope View (Options\View Envelopes) and Envelope
ACTIVE are both turned on, the volume envelope is indicated by a yellow line in
the region, and the audio volume follows that envelope. If the ACTIVE button is
off, volume changes will not be heard.
The default envelope level is unity gain, at approximately 75% of the full region
height. Although there's no calibration scale for the volume envelope, clicking on
the volume envelope line with the Envelope Node tool opens up a readout window,
showing the gain at that point. Full scale represents a gain of 6 dB, while the
bottom of the region is full off.
IMPORTANT: Even though View Envelopes is turned on, the volume envelope line
will only be displayed if the envelope has been made ACTIVE in the Region Editor
window or the Options pulldown menu. Conversely, if the volume envelope is AC-
TIVE in the Region Editor and View Envelopes is not turned on, the envelope will
not be visible in the region, however the volume will follow the (invisible) enve-
lope. Hence, it's possible to have volume changes occurring within a region that
you don't see on screen. If you work with volume envelopes, it's best to leave
View Envelopes on.
When the Hand tool is
placed on the inside
boundary of a fade region
and above the centerline of
the waveform display, the
"hand" changes to a "fade"
tool. This fade tool, which
looks like a quarter-circle,
is used to drag the edge of
the fade region to extend or
reduce the fade length.
Fade length can also be
adjusted "by the numbers"
by opening the Region
Editing Guide
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