Access Virus Rack XL, User Manual

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158
CHAPTER 13
Appendix
System Exclusive
Data
SYSTEM EXCLUSIVE
IMPLEMENTATION
The Parameters of the VIRUS are organized in
three so-called pages A, B and C. Each page
contains 128 parameters, addressed by num-
bers from 0 to 127. Each parameter is repre-
sented by one byte with a maximum value of
127. All parameters are individually accessible
by SysEx-Parameterchange.
The pages A and B represent a Single-Program,
thus a Single-Program contains 256 Bytes.
Page A (LowPage) contains Single parameters
that are usefull for MIDI automation. The param-
eters of this page are additionally controllable
by MIDI Control Change. The sending and re-
ception of MIDI Control Change can be enabled
or disabled by MIDI CONTROL LowPage (CTRL
menu). When disabled (
LowPage=SysEx ), the
VIRUS only sends and receives SysEx Parame-
ter Change on Page A. When enabled (
Low-
Page=Contr ), the VIRUS sends MIDI Control
Change on parameter movement, and receives
both MIDI Control Change and SysEx-Parame-
terchange on Page A.
The default setting is LowPage =Contr.
The remaining Single parameters in Page B
(HiPage) are additionally controllable by MIDI
Polyphonic Pressure (!). The send and reception
of MIDI Poly Pressure can be enabled or disa-
bled by MIDI CONTROL HiPage (CTRL menu).
When disabled (HiPage=SysEx), the VIRUS only
sends and receives SysEx Parameter Change
on Page B. When enabled (HiPage=PolyPrs),
the VIRUS sends MIDI Poly Pressure on param-
eter movements, and receives both MIDI Poly
Pressure and SysEx Parameter Change on
Page B. This feature should not be used in con-
nection with a keyboard that sends Polyphonic
Pressure.
The default setting is HiPage=SysEx.
Page C contains Multi parameters and Global
parameters. These parameters are sent and re-
ceived only by SysEx Parameter Change.
In the following, all bytes are shown in hexade-
cimal representation.
CONTROL CHANGE MESSAGE (ONLY
PAGE A)
Bc Status byte,
c=MIDI channel
nn Parameter Number 0..127
(see parameter list Page A)
vv Parameter Value 0..127
see parameter list Page A)
The Control Change messages are defined
as Performance Controller (e.g. Modulation
Wheel or Hold Pedal) or Sound Parameters (e.g.
Cutoff or Patch Volume). The Performance Con-
trollers are not stored with a Single-Sound. If
more than one Multi Part is set to the same MIDI
channel, all Parts on this MIDI channel receive