Martin LIGHTING DIRECTOR, User Manual, Page: 26 / 105

The five stage markings will not appear on your editor window because the program
hides them as it knows that they are default values that do not correspond to your real
markings, since no tracker measurements were made.
Side note: by pressing the editor’s “Options” button, you may view these default calibration
points and set a different “interactive perimeter”.
MANUAL IRREGULAR CALIBRATION should be used only if for some reason
automatic calibration is not possible and the speakers are not in a “regular”
configuration (not at right angles to each other or not at the same height from the stage
floor). To use the manual irregular method you must measure the exact position in
centimetres of each speaker relative to the origin, which is the centre stage mark.
By convention:
•
At the origin the X, Y and Z are zero.
• X is the stage width, with positive values towards stage left and negative values
towards stage right.
• Y is the stage depth, with positive values towards upstage and negative values
towards downstage.
• Z is the stage height, with positive values above the stage floor.
Downstage
Upstage
Stage
Left
Figure 9 - MLD coordinate system
Stage
Right
+Y
-Y
+X
-X
Once you have entered all twelve distances select the “Use Manual Irregular” button to
use those values to calculate speaker positions. As with the other two methods, once
the speakers are calibrated you may press OK to exit the speaker set-up screen and
click OK again to exit the set-up screen. If you use the Manual Irregular Calibration the
five stage markings that appear on your editor window are not affected. You may hide
the calibration points and set a different “interactive perimeter” by pressing the editor’s
“Options” button.
Side note: for the automatic speaker calibration, sometimes props or other obstructions make
it impossible to measure the distance between stage marks or to have tracking take place right
above the markings on the floor. In these cases, it is possible to measure the points at a fixed
height from the floor. For example, suppose you can only track at a height of one meter and a
half: a) take a measuring tape or a measured plumb bob and use it to find the tracker at
Page 26 MLD manual 1.1