X% - I didn't want to repeat all the 0%, 25%,... buttons you have.
Loopback: it is an input/output plugin that allows to use output of a universe as input
to another (or the same one). It allows many cool tricks.
External control: you can control virtual console widgets (move sliders, push buttons)
from e.g. MIDI controllers, DMX input, and you guess it: loopback input.
In other words, in addition to mouse/keyboard, there are these ways to control virtual console.
Universes: it's best to keep each universe dedicated to one thing. Don't mix real lights and
loopback fixtures in one universe. There are plenty of universes in QLC, you can add as many
as you need.
So: Universe 1 for real lights and
patch output to DMX output device you have, artnet
or whatever. No loopback here.
Universe 2 for loopback fixtures/dimmers, patch both output and input to loopback 1.
You can delete Universe 3 and 4 for now if you want.
You can also rename the universes to make their purpose clear (Universe 1 - lights,
Universe 2 - loopback)
This part should be already clear: submaster. Put a slider in the frame, and change it's
type to submaster. When you start e.g. 100% scene, and pull down the slider (towards 0),
the light output should be reduced as well. You can see that even without real lights
in the
DMX monitor.
Now the button to control the submaster:
- add Generic Dimmer 1 channel to Universe 2
- add Scene called Submaster Control that sets the above Generic Dimmer channel to 255
- add button (outside of everything) that starts the Submaster Control scene.
- open submaster slider properties, in the external control box click Choose...,
expand universe 2, double click the message that tells you to doubleclick it, and type 1.
click OK, OK, to close the properties.
Now when you switch to run mode, when you push the button on and off, the slider goes up
and down (or vice versa) and lights go on and off as well. That is almost what you want,
but reversed (when button is pushed, lights are on, when not, lights are off). If you want
the other way (push to reduce), go to fixtures tab, open
channel modifiers dialog,
and assign Invert modifier to Generic Dimmer channel in universe 2.
Possible modifications:
- you may change the value in Submaster Control scene so that the lights are not reduced
to full blackout (e.g. if you set to 127, you get 50% reduction)
- you may assign fade in/fade out time to that scene, so that lights go off/on slowly.
- you may play with the modifier curve to e.g. make the lights go off faster for a while
and then slow down