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6.2 MIDI
specifications
This paragraph describes the specifications on the MIDI Implementation
Chart in more detail.
Default basic channels (transmitted/recognised)
3-manual instrument (with default keyboard layout):
1: Choir
2: Great
3: Swell
4: Pedal
12: Stops
Basic channel changes (transmitted)
Can be programmed using the MIDI program.
Control changes (transmitted)
Controller 7 (07h)
General volume, with volume values 40 (28h) –
127
(7Fh).
Controller 11 (0Bh)
Expression pedals, with volume values 63 (3Fh) –
127 (7Fh).
Controller 6 (06h)
Pitch, with pitch values 33 (21h) - 95 (5Fh).
Pitch value 64 (40h) = A = 440 Hz.
The following applies to the pitch:
LSB 100 (64h) 1 (01h) and the MSB 101 (65h) 0
(00h).
Transposer, with transposer values 61 (3Dh) - 67
(43h).
Transposer value 64 (40h) = A = 440 Hz.
The following applies to the transposer:
LSB 100 (64h) 2 (02H) and the MSB 101 (65h)
0(00h).
Control changes (recognised)
Controller 7 (07h)
General volume, with volume values 0 (00h) –
127
(7Fh).
Controller 11 (0Bh)
Expression pedals, with volume values 0 (00Fh) –
127
(7Fh).
Program changes (transmitted/recognised)
Organ stops: Depends on the number of stops and the sequence of stops.
MIDI stops (programmable): 1-128.
System exclusive messages (transmitted/recognised)
Each ‘sys ex’ (system exclusive) message mainly looks the same. The first
7 bytes and the last byte are always the same. Only the value of the 8th
byte varies. This is the ‘sys ex message’ that Johannus generally uses: F0
00 4A 4F 48 41 53 XX F7 (hexadecimal). The ‘sys ex messages’
described below only indicate the value of the 8th byte (XX) and the output
from which it is transmitted.
