<h2>Crossfades</h2>
<p>
- <dfn>Crossfades</dfn> refer to the behavior of two audio regions transitionning
+ <dfn>Crossfades</dfn> refer to the behavior of two audio regions transitioning
smoothly (mixing) from one to another on the same
track. Historically, this was done by splicing two pieces of analog
tape together, and this concept was carried forward into digital
two regions are butted against each other, there needs to be a method
to splice them smoothly together. The crossfade allows one region
to fade smoothly out, while the next region fades smoothly in, like two
- pieces of tape that have been cut at and angle, and overlapped.
+ pieces of tape that have been cut at an angle, and overlapped.
</p>
<p>
But Ardour uses a more refined "layered" editing model, and
therefore it is possible for multiple regions to be stacked on a single
location with arbitrary overlaps between different layers. For
this reason, crossfades must be implemented differently. It can't be
- assumed that a crossfade is an entitry that exists between two regions;
+ assumed that a crossfade is an entity that exists between two regions;
instead each region must have its own associated crossfades at each
end, and the topmost region must always crossfade down to the
underlying region(s), if any.
<p>
To activate/deactivate or change the shape of a region's fadein or
- fade-out, the cursor has to be hovered over the regionfade grip until the
+ fade-out, the cursor has to be hovered over the region fade grip until the
cursor tip indicates region fade editing, then <kbd class="mouse">right</kbd>
clicked to bring up a context menu. In the context menu is a list of options
- for the regionfade. <kbd class="menu">Activate/Deactivate</kbd> enables and
- disables the regionfade.
+ for the region fade. <kbd class="menu">Activate/Deactivate</kbd> enables and
+ disables the region fade.
</p>
<p>
Because each fade is also a crossfade, it has an inverse fade shape
</p>
<table class="dl">
<tr><th><kbd class="menu">Linear</kbd></th><td>A simple linear coefficient
- decrease, and its mathematical inverse. A Linear fade starts attentuating
- quickly and then cuts off even more abruptly at lower levels. When used as a
+ decrease, and its mathematical inverse. A Linear fade starts attenuating
+ quickly, and then cuts off even more abruptly at lower levels. When used as a
crossfade, the signals are each -6dB attenuated at the midpoint. This is the
correct crossfade to use with highly-correlated signals for a smooth
transition.</td></tr>
- <tr><th><kbd class="menu">Constant power</kbd></th><td>The constant power
+ <tr><th><kbd class="menu">Constant Power</kbd></th><td>The constant power
curve starts fading slowly and then cuts off abruptly. When used as a
- crossfade between 2 audio regions, the signals are symetrically attenuated,
+ crossfade between 2 audio regions, the signals are symmetrically attenuated,
and they each reach -3dB at the midpoint. This is the correct crossfade to
- use when splicing audio in the general ( uncorrelated ) case.</td></tr>
+ use when splicing audio in the general (uncorrelated) case.</td></tr>
<tr><th><kbd class="menu">Symmetric</kbd></th><td>The Symmetric fade starts
slowly, then attenuates significantly before transitioning to a slower
fade-out near the end of the fade. When used as a crossfade, the Symmetric
- curve is not mathematically correct like the Equal Power or Linear curves,
+ curve is not mathematically correct like the Constant Power or Linear curves,
but it provides a slower fade-out at low volumes. This is sometimes useful
when editing 2 entire music works together so that the transition is more
gradual.</td></tr>
<p>
These fade curves are developed to provide a range of common uses, and
are developed with the least possible amount of changes in the "slope"
- of the line. This provides artifact-free crossfades. Some
+ of the line. This provides artefact-free crossfades. Some
DAWs provide complicated fade editors with parametric "spline" controls
of the fade curves. While it might be interesting to develop a
fade curve with a faster cutoff, the mathematical difference between