Grass Valley Kayenne v.3.0 - Manual (Page 336)

336 KAYENNE — User Manual
Section 3 — System Operation
E-MEM Control of External Devices
Introduction
E-MEM effects can be used to:
• Load, cue, play, and stop DDR clips, and
• Cue, play, and stop tapes in VTRs.
E-MEM device control is good for recalling the same clips repeatedly, and
for integrating clips into specific switcher effects. Manual control is appro-
priate when different clips are used each time, and when clips are not used
in a switcher effect (like rolling a news story and taking it directly to air.)
E-MEM device control operates independently from the manual controls
on the Multi-Function or Device Control Module, but both mechanisms can
be used together. For example, an E-MEM recall can make a VTR cue up,
then the module can be used to roll that tape.
E-MEM External device control utilizes events. External device events are
different from other parameters in the Kayenne E-MEM system. Rather
than defining a value at a keyframe and smoothing the transition between
keyframes with interpolation, a device event consists of instructions sent to
the external device at the time cursor passes the keyframe during an effect
run. This similar to GPI and PBus triggers.
Controlling an external device typically requires spacing the instructions
over two or more keyframes. The space between keyframes allows the
device to respond to the first set of instructions. For example, a DDR or VTR
takes time to load and cue before it can play. The effect must be built so that
a play event does not occur until the device is ready, or the command will
be executed late or not at all.
The Kayenne system does not play a DDR or VTR in sync along with the
timeline as is done with digital effects devices controlled by CPL. Instead,
the Kayenne system issues a play command and then lets the device
manage its own playback. This means that if the Kayenne effect is length-
ened or shortened, the device’s playback may not line up with the effect as
intended. Device playback does not speed up or slow down if the duration
of the effect changes.
Configuration
Kayenne Device Control option software must be installed and configured
to permit either manual or E-MEM control of DDRs and VTRs. Sources will
also need to be configured as external devices in Eng Setup.
E-MEM control for external devices is by default assigned to the Misc 16 EXT
Master E-MEM Module enable group button. This can be changed in the
User Setups , Suite Prefs , E-MEM Prefs menu.