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 simultaneously. 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.

If a Playback is set to “HTP Always Active” then raising the fader or pressing the FLASH button will not use any specified Intensity delay or fade times. If the Cue Stack has multiple steps then delay and fade times will still be used when changing steps – i.e. pressing the GO or PAUSE buttons.

The “HTP always active (Use HTP)” has priority over the “All chans controlled LTP” option – therefore HTP channels on playbacks will be output regardless of any other higher priority faders with “All chans controlled LTP”.

LTP channels will be activated in the normal way – i.e. by pressing GO, or if the “Fader activates” option is set by moving the fader upwards. If the “Flash activates” option is set then pressing the FLASH button will also activate the channels.

When one of the main faders has HTP levels active then it is coloured orange. Only once the playback is activated fully will it be coloured red.

Note that this option affects all channels that are patched as HTP channels (normally only Intensity – but potentially other attributes if desired).

18.4. LTP handling

The MagicQ console provides powerful handling of LTP (Latest Takes Precedence) channels allowing new effects to be “bumped” onto intelligent heads for a period of time before reverting to the previous effect.

Note that several other consoles handle LTP channels in a less intuitive way - when the last active playback is returned to zero then the values on that playback still control the channel rather than reverting to the previous raised playback that is still active.

The programmer always over-rides playbacks. If a LTP channel is active in the programmer then playbacks will be disregarded for this channel.

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 MAC500 positions (channels) whilst another has MAC500 movements (FX).

18.5. Interaction of FX between Playbacks

By default, the FX and levels on MagicQ operate independently so it is possible to have a FX running on one Playback and the level (base values that the FX is applying to) coming from a separate Playback.

Only one FX is ever active on a particular channel, so the FX from the last touched playback will over-ride any FX for that channel from other playbacks.

If a Playback has a Cue with both a FX and a level for a channel then that will Playback controls then the output will be the level plus the FX from that Playback.

If a Playback has a Cue with only a level for a channel (i.e. no FX), then a FX may be added to that level from another active Playback.

It is possible to set the Cue Stack option “Ignore FX from other Playbacks” so that when the Playback is the last touched Playback, any FX from other Playbacks are ignored, regardless of whether this Playback has FX for these channels.

It is also possible to set the Cue Option “Block FX” to block other Playbacks with FX from affecting the levels in a particular Cue. Note that when the option “Programmer overrides FX” is active (e.g. in Hog II Warp mode) then Cues are automatically recorded with the “Block FX” option set. The Cue option “Block FX” can be viewed and changed in the Cue Stack Window (page right).

An alternative way to block FX from other Playbacks is to use “Add FX Zero Size” in Cues where you wish to block other Playbacks.

18.6. Playback Priority

By default all playbacks have the same priority. It is possible to set a playback to maximum priority using the Cue Stack option “Highest Playback priority”. The options are:

  • Normal – same priority as other playbacks – last activated has control
  • Mid – above Normal but lower than programmer
  • High – highest priority of all playbacks but lower priority than the programmer
  • Above Programmer – higher than playbacks and the programmer

When the Cue Stack has highest priority, LTP channels under control of the playback are not affected by other playbacks. HTP channels continue to operate as normal.

18.7. Playbacks ignore masters levels

Sometimes it is necessary to program playbacks that are not affected by the Grand Master or Sub Master. Use the “Masters do not affect level” option to prevent the Cue Stack being affected by the master faders – this is useful for controlling channels that must stay up – e.g. house lights, smoke machines etc… Cue Stacks set with this option are not affected by grand master, sub master, DBO button.

Cue Stacks with this option set are not released by pressing SHIFT RELEASE to release all playbacks.

18.8. Playback Stomping

There is a Playback Stomping option in the Setup Window, View Settings, Playback. With this option enabled playbacks that have been fully overridden by other playbacks will be automatically released (stomped).

This is useful in some environments such as night-clubs where the operator wishes to continually play back new functions without having to turn off the older functions.

There is a choice of Stomping - LTP or both LTP and HTP.

When set to just LTP then playbacks that contain HTP channels are never released (stomped) as they may still be affecting the output. When set to LTP and HTP then playbacks are stomped if all of the LTP channels have been overridden by another playback and the HTP channels are at the same or higher level in another playback.

When using the Playback Stomping option it is possible to allow some playbacks to be marked as “non stomping”. This enables certain playbacks to be bumped in without stomping over the original playback.

18.9. Group Masters (Inhibit Masters)

Playbacks can be used to control groups of channels – you can assign a playback to be a master for Intensities, FX size or FX speed for a specified set of heads. Using Intensity Masters you can make an “Inhibit Master” to give overall control for the levels of a group of channels.

Group masters can be based either on a particular group in the Group Window, or based on the channels recorded into a Cue. Masters based on groups are updated whenever a group is changed.

Group Masters are activated and released in the same way as normal Cue Stacks. When you set Cue Stacks to be Intensity Masters, FX Speed or FX Size Masters it is not necessary to set Fader Activates Stack to No and Fader Releases Stack to No. MagicQ will ignore these settings and always activate only using the GO button and release using the RELEASE button.

When editing the channels in a Group Masters you should ensure that the fader is released before you make the edit.

Note that the channel levels, times, and FX information in the Cue that is used as the Group Master are ignored and hence do not affect the output in any way.

18.9.1. Intensity Masters

Group based Intensity Masters

To make an Intensity Master based on a Group simply clear the programmer, then select the Group and record to a Playback. Make sure that there are no active channels in the programmer. MagicQ will automatically create a Group Master, setting the Cue Stack Options, Function, Intensity Master = Yes and setting the Cue Stack Options, Function, Group Id to the selected Group.

The group associated with an Intenity Master can be changed in Cue Stack Options, Function. When a group number other than 0 is set in the Cue Stack Options, Function menu then MagicQ automatically edits and generates the Cue assigned to the first step in that Cue Stack. Ensure you set the group id on the correct Cue Stack.

You can have multiple Group Masters that control one channel – they will work together.

Channel based Intensity Masters

It is possible ro record an Intensity Master without a link to a particular group.

Record a cue with the channels that you wish to control - the level of the channels can be any level as long as the channel is in the programmer. Then set the Cue Stack option "Fader is an Intensity Master".

Activate the playback (press GO or raise the fader) and now it acts as an Intensity Master. Press RELEASE to stop the master having any effect.

18.9.2. FX Size and FX Speed Master

FX Size and FX Speed masters allow control of the FX size and speed on multiple heads, either based on a group or based on the channels recorded into a Cue.

You can set-up multiple FX Size and FX Speed Masters – however you should only have one Master of each type to control each head – otherwise there is a conflict.

To make a FX Size or FX Speed Master you record a single Cue onto a Playback. Then in Cue Stack Settings, Function set the FX Size Master or FX Speed Master to Yes.

Group based FX Size and FX Speed Masters

For group based FX Size and FX Speed masters simply set the Group ID in Cue Stack Settings, Function.

To choose which attributes to control set the Group Attribs.

Channel based FX Size and FX Speed Masters

For channel based FX Size and FX Speed masters, record a Cue that contains the attributes that you wish to control.

To make a FX size master for pan movement, record a cue with only the pan attribute in the programmer for the heads you wish to control. Then set the Cue Stack option "Fader is a Size Master". Activate the playback and now it acts as a FX Size Master for pan movement.

18.10. Advanced activate and release options

The FLASH button can be set to release the Cue Stack using the “Flash releases stack” option. This option works in a slightly different way depending on the “Fader releases stack”.

When “Fader releases stack” = “no” (Theatre, Hog II Warp modes), pressing and then releasing the FLASH button will always release the stack regardless of the fader level. When “Fader releases stack” = “yes” (Normal mode), pressing and releasing the FLASH button will only release the Cue Stack if the fader is at 0.

The Cue Stack can be configured in different ways to affect whether the Cue Stack resets to the first step on release, whether it stays at the current step, or whether it moves on one step.