Game Development Reference
In-Depth Information
The 3D Settings shown here indicate a custom Rollof . Note that
the Min distance is now controlled by the curve.
The curve of the graph essentially governs the way that the volume will
be reduced between the Min and Max Distance from an Audio Source.
There are two preset modes—
Linear
mode, and
Logarithmic
mode.
Although Logarithmic mode is considered more realistic to the way the
human ear hears sound, Linear mode may be preferred in some cases,
as the volume will drop of more gradually in comparison. You can also
customize the curve by adjusting any of the nodes, or double-clicking
the mouse to create more nodes. When you do so the menu will indicate
that you are now creating/editing a Custom curve, and the Min Distance
setting will blank out, because it is to be controlled by your custom curve
rather than a preset distance.
In this case we've started with a Linear setting and then we adjusted it by
adding a point to curve the line just slightly. We've set the Max Distance
to 30, which will help to keep the sound localized.
There are a few more of these 3D settings to mention. Most of these can
also be controlled by curves drawn in the same graph area as Volume:
•
Doppler Level
: This is a static control (no curve available) that changes
the pitch of a sound based on the velocity (speed) of the Listener or
the Source, enabling you to get semi-realistic ef ects when moving
fast. It's not very convincing, however, as it only changes pitch and not
phase. Best to use it sparingly or not at all.
•
Pan
: The pan control does not behave the same as a standard pan
control in a typical stereo coni guration. In ef ect, it governs how well
