Volume Envelope (Node Tool) - Mackie HDR24 Editing Manual

NOTE: When splicing together two continuous waveforms (shortening a
Didgeridoo solo, for example) that are close to full scale amplitude, it's possible
that they'll attempt to sum to greater than full scale in the crossfade region. This
will both sound ugly and look ugly if you zoom in on it. Attack this problem by
changing the shape of the crossfade curve so that both sections aren't near full
gain simultaneously.
Toggling the AUTO X-FADE function on or off will not affect any currently existing
crossfades. Crossfades become part of the region, so if a region spliced with a
crossfade is moved elsewhere, the crossfade will be carried along with it.
Volume Envelope (Node) Tool
The Node tool allows adjustment of the volume level within a region (which could
be the entire track). The pencil cursor is used to add nodes, or inflection points at
which the volume can be changed. Clicking on the volume envelope line with the
Node tool drops a node on the line. Nodes can be dragged along the volume
envelope line horizontally or vertically. By inserting nodes at the appropriate
places, you can create a mute, duck a note or word, or do a custom fade-in or fade-
out.
Holding the CTRL key with the Node tool active, changes the pencil to an eraser
for deleting nodes. When a node is deleted, the line straightens out to connect the
remaining nodes. When all nodes are deleted, you're back to a straight line.
The first node you place in a region will be placed at unity gain (0 dB). You can
increase the audio level within the region by up to 6 dB, or lower it all the way
down to zero. While not a replacement for mix automation, it's handy for muting
portions of a track, or adjusting the level of a punch-in so that it matches the rest
of the track.
There are nodes at the beginning and end of the region which cannot be deleted
(without them, there wouldn't be anything to define the line), though they can be
dragged vertically to adjust the overall volume of the region.
Pressing the Shift key when the Node tool is active turns the pencil cursor into
a double-headed vertical arrow. This tool allows you to drag the envelope line
vertically and parallel to itself. In reality, it's dragging the pair of nodes that define
the line segment. If the envelope line is horizontal, Shift-clicking and dragging
the line adjusts the overall playback level of the track.
Note: Volume Envelope functions are interactive with the Envelope Active switch
in the Region Editor, and the View Envelopes setting in the Options menu. See
Page 19 for additional details.
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HDR 24/96