ChamSys MagicQ User Manual - Manual (Page 172)

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Chapter 18
Advanced Playback / Cue Stack Options
18.1 Interaction of HTP and LTP channels between Playbacks
Channels are set as either HTP (Highest Takes Priority) or LTP (Latest Takes Priority) in their personality file – the property can
be edited in the Head Editor.
By default, Playbacks use the HTP / LTP property to determine how channels are controlled from multiple playbacks simultane-
ously. For HTP channels the highest level will be output, for LTP channels the highest priority or latest touched playback will
control the channel.
This operation can be modified on a per Cue Stack basis.
18.2 HTP handling
The console handles HTP (Highest Takes Precedence) channels in a very simple way - the highest value from all the playbacks,
the programmer and the preset faders is the value that is output.
If the "Programmer overrides HTP chans" option is enabled then any HTP channels in the programmer will override channels on
the playbacks. Channels on preset faders still affect the output.
The console supports a powerful swap mode selected through the ADD/SWAP button. In SWAP mode when a FLASH button
for a playback is pressed then the HTP channels from all other playbacks are disregarded. Only playbacks with a FLASH button
pressed affect the HTP output. Similarly, the programmer and preset faders have no effect on HTP output.
FX and channel values are handled independently enabling operators to program one playback with channel values and one with
FX. For example one playback could have an ambient level whilst another has a dimmer chase. The FX is added to the highest
channel value.
Note that if a Cue Stack on a Playback is set to “All chans controlled LTP” then when that Playback is activated as the last
touched playback then all channels controlled by that Playback are considered to be LTP. Thus that Playback will exclusively
control the levels of all channels used by the Cue Stack.
18.3 HTP always active (Use HTP) option
By default HTP channels programmed in a Playback only affect output when the Playback is active. It is possible to make a
Playback so that the activation of the Playback is separated from the operation of the HTP channels using the “HTP always active
(Use HTP)” in Cue Stack options, Activate/Release.
When this option is set, then HTP channels on the playback will be output whenever the fader is above the activation point
(defaults 0) regardless of the other activate options on the Cue Stack. They will only be released when the fader is taken back
down to 0. They are not affected by pressing the RELEASE or the SHIFT RELEASE buttons.