GRASS VALLEY GV KORONA, User Manual, Page: 232 / 415

Device Control
RossTalk XPression Device Control
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About E-MEM Control of External Devices
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 appropriate 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.)
For Kayenne systems, 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 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 the cursor passes the keyframe during
an effect run. This is 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 GV K-Frame XP system does not play a DDR or VTR in sync along with the timeline like
digital effects devices controlled by CPL. Instead, the system issues a play command then
lets the device manage its own playback. This means that if the effect is lengthened 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
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.
Operation
E-MEM Device Control is accomplished by:
• Associating an external device with an E-MEM enable group button (factory default is
Misc 16 EXT),
• Enabling the E-MEM button for that enable group and, if editing the effect, delegating
that enable group for editing,
• To run E-MEM Device Control effects, ensure the device(s) are Enabled for E-MEM
control, using the Devices, Enables menu. Devices do not need to be enabled in this
menu when building an effect, however, and in fact it may be desirable to disable
them at that time.