54
Viscount
Chorum
User Manual
SYSTEM MESSAGES
SYSTEM EXCLUSIVE
These messages can only be interpreted by an instrument made by the same producer as the transmitter
device (in some cases only by the same model). They mainly relate to the instrument’s sound generation
and programming parameters. The organ uses these messages to control all the internal parameters and for
switching the voices on and off.
REAL TIME
These messages are used for the real-time control of specific modules or functions of a connected
instrument. These messages include the Start, Stop, Pause/Continue and Clock commands.
START:
the sequencer has started to record or play back a MIDI sequence
STOP:
the sequencer has been stopped
PAUSE / CONTINUE:
the sequencer has been set in stop status
CLOCK:
the sequencer speed
N.B.
The organ does not transmit / receive the messages described above. They are described for your information only.
The Real Time messages also include the Active Sensing code, sent to keep the dialogue between two
MIDI instruments alive. When the receiver instrument does not receive any MIDI data or the Active
Sensing code in a time interval of about 300 milliseconds, it considers the MIDI connection to have been
deactivated, so it switches off any notes still active. Remember that the transmission and reception of this
message is optional, so not all instruments are equipped to handle it.
10.6 DETAILED MIDI IMPLEMENTATION
CHANNEL MESSAGES
Using default settings, channel messages are sent
on the following MIDI channels:
3 MANUALS MODELS
-
Ch.1: Man.III notes or controls
-
Ch.2: Man.II notes or controls
-
Ch.3: Man.I notes or controls
-
Ch.4: Pedal notes or controls
2 MANUALS MODELS
-
Ch.1: Man.II notes or controls
-
Ch.2: Man.I notes or controls
-
Ch.4: Pedal notes or controls
Ch.16 is a reserved channel (system)
Note On
Message which is generated when a key is
pressed.
Data format: 9nH kkH vvH
n=channel number
:0H–EH (1–15)
kk=note number
:1EH–65H (30–101)
vv=note on velocity :01H–7FH (1–127)
:00H (0) Note Off
Note Off
Message which is generated when a key is
released.
Data format: 8nH kkH vvH
9nH kkH 00H
n=channel number
:0H-EH (1–15)
kk=note number
:1EH–65H (30–101)
vv=note off velocity :00H–7FH (0–127)
ignored
-
This message can be also received as Note
On with velocity=0.
Control Change
Messages to control volumes, expressions and
other system controls.
•
Bank Select MSB (CC 0)
Controller transmitted in combination of
Program Change and Bank Select LSB in order
to select a specific bank of sound. It can be
transmitted using the COMBIN. PRG function
and when stored in the combinations and Tutti.
It also can be received on channel 16 to select
the Memory Bank.
