YORKVILLE LP608 Manuel De L'utilisateur page 7

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The LP608/LP304/LP302 Lighting System responds to three types of MIDI commands: Note ON
/ Note OFF (Light ON / Light OFF), Pitch Wheel (fade control rate), and Program change (selects
scenes, effects or Blackout). Lights respond to MIDI note commands in a straightforward manner
– brightness is akin to a loud note. When velocity information is present, a high velocity corresponds
to a high intensity for the light. A note OFF or with a velocity of "0" the light will turn off. For note
information to be used, the LP608 must be in Preset Mode. Note commands change the current
preset as well as the intensity of the lights.
The fade rate is the current fade rate, which may be altered using the rate control on the LP608.
It can also be changed by the MIDI pitch wheel command. The controls on the LP608 are active
while the MIDI input is being used. This allows users to program the performance on a computer or
a sequencer while being able to make spontaneous changes directly on the controller.
The MIDI pitch wheel allows a greater range of the rate than the actual rate controls on the LP608
itself. It's possible to program a fade lasting 10 minutes or longer with the MIDI input. Remember
that any movement of the onboard rate control (on the LP608) will return the rate to within the lim-
ited range of the LP608. Larger numbers on the pitch wheel signifies a faster rate of change. Only
the most significant byte is recognized by the LP608 Lighting System, therefore there are only 128
possible fade rates. A rate of 3F (HEX) or 64 (DEC) corresponds to a medium-slow fade rate.
All of the effects have a rate associated with them. There's one rate stored, and used, for all
effects. This rate is different and distinct from the current fade rate for fades between presets.
When the LP608 Foot Controller is in Effects Mode, any rate control information changes the
effect rate (when it's in preset mode, the current fade rate is changed). This operates similar to
the rate control on the LP608.
The MIDI program change command, the one that changes the instrument being synthesized,
is used to change presets, to start an effect or to invoke a blackout. Program changes 1– 6 are
presets 1 – 6. Program changes 7 – 12 are the effects.
Program change 13 invokes a blackout. This is the only MIDI command that deviates from oper-
ating the corresponding control on the LP608 Foot Controller. When the LP608 is in blackout
mode and a MIDI blackout command (PC 13 DEC) is received, the LP608 will remain in blackout
mode. Depressing the blackout switch while in this state would return the LP608 to the previous
preset or effect. To exit the blackout mode through MIDI you must issue a program change 1 – 12
command. The MIDI blackout command is not a toggle, however the blackout footswitch is.