CHD Elektroservis VK-8M, Owner'S Manual, Page: 5 / 8

VK-8M
Remote Controller
Model 8-708 ver. 1.0
Copyright © 2004 CHD Elektroservis, s.r.o.
All rights reserved. No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis, s.r.o.
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3.2. ACTIVATION OF SELECTED EFFECT
Via food switches [10], [13], [16] you can define, which effect of VK-8M module is assigned to be controlled by controller.
You can assign only one of them. The assigned effect is indicated by blinking or steady lighting of yellow LED ACTIVE [11], [14],
[17].
Just after switch ON (after the Initialization sequence) is not assigned any effect of VK-8M so there is not lighting any yellow
indicator LED ACTIVE [11], [14], [17].
After first press of food switch for selected effect [10], [13] or [16] only lights or blinks corresponding yellow LED ACTIVE
[11], [14] or [17] – effect is activated, but actual effect state (On/ Off) will not change.
3.3. SWITCH THE ACTIVE EFFECT ON/ OFF
If you repeat press of food switch [11], [14] or [17] for assigned effect, this effect will switch On/ Off. The immediate state
(On/ Off) is indicated by LED ON/OFF [12], [15] or [18].
3.4. CONTINUAL CONTROL OF ACTUAL EFFECT
VK-8M module actual effect continual control is available either manually, by FX-LEVEL [8] or via external pedal, connected
to EXPRESSION-PEDAL [9] connector. The controlling manner is automatically defined during reset after switch On: If there is
not any external pedal connected, controller works manually by FX-LEVEL [8]. If there is not any external pedal connected,
controller ignores manual FX-LEVEL [8] and accepts only external pedal signal.
Note: Never connect or disconnect the external pedal during work (if the controller is ON). There is no risk of damage of any
part indeed, but there is no guarantee of correct working of continual effects control VK-8M module. Manual (internal) or
external adjustment are controlled by two different sections of controller's operating system and relevant section is selected only
during switch On. Changes of regulator type made during working the controller does not accept and gives no answer to them.
The continual control you can do only with the VK-8M's effect, which is actually active – the one, whose yellow LED ACTIVE
[11], [14] or [17] lights steadily or flashes. If relevant LED flashes, it means the continual control is permitted, but continual
regulator (internal FX-LEVEL [8] or external pedal) location does not match the set level in VK-8M module. This state can
happen mostly when changes the actual effect or program (sound) on VK-8M. When LED ACTIVE [11], [14] or [17] flashes, ti is
needed to move the continual regulator as long as is the value caught – it means to compensate a value given by location of
regulator’s level and value of effect’s level, set on VK-8M. After caught the LED ACTIVE [11], [14] or [17] lights steadily and only
from this moment is possible to control the level of actual effect by continual controller.
3.5. PROGRAM CHANGES ON VK-8M
When you change a program on VK-8M module (sound bank), either by buttons on panel of VK-8M module or by MIDI
message from control keyboard, and so on, there is automatically changed also the actual setting of controller by the new
parameters of VK-8M sound (because of bi-directional MIDI communication, when controller and VK-8M immediately change
each other all of needed information). In the case of Program Change (sound) on VK-8M user does not need to change
manually the controller setting and also does not need to repeat button press of RESET [7] as during switch on.
3.6. REMAPPING OF MIDI CONTROLLERS
Because VK-8M module does not recognize MIDI controller No. 7 (Volume), is this controller remapped to No. 11
(Expression), to be possible to change the Volume of VK-8M module by regular pedal on MIDI data sender (Control keyboard,
PC, sequencer, ...). This remapping is done automatically on all of MIDI channels. At the same time is on all of MIDI channels
filtered out MIDI controller No. 11 (Expression), to prevent the collisions, when MIDI data source sends both of controllers No. 7
and No. 11.
Note: Remapping controller No. 7 and filtering controller No. 11 proceed only on MIDI-VK8M-OUT [5], MIDI data on MIDI-
BUS-THU [3] are rest without changes – they are identical to data on input MIDI-BUS-IN [2].
3.7. FILTRATION OF UNWANTED DATA
Operating system of VK-8M module contents an error, which principally disallows its no limit integration into the MIDI set of
equipment made by other producers than Roland Inc. This error consists in the fact, that any time is received command „GM
Reset“ (SysEx: F0 7E 7F 09 01 F7) or „XG Reset“ (SysEx: F0 43 10 4C 00 00 7E 00 F7), module is steadily latched and it is not
possible to control it any way even instead selected sound starts to generate only a noise and not defined glissandos.
That is why we included in front of VK-8M output (MIDI-VK8M-OUT [5]) the filter of the SysEx messages written above,
which blocks their sending into VK-8M, so the module cooperation with any other instruments (Yamaha, …).
4. WORKING STATES INDICATION
All of controller’s working states are indicated by LEDs on front panel – see Picture 1. Some combinations of LED lights can
also indicate the Error states.