GS
Format
Sound
Selection
Instructions
The leading-edge MIDI capabilities
of
the 525 / 535 organ from Rodgers include a function
known
as
GS
Format
Sound
Selection. GS Format Sound Selection greatly increases the control
that Rodgers owners have with MIDI (or Musical Instrument Digital Interface).
To this point, MIDI has used 128 different
Program
Change
messages to select sounds. Page
10
of this Owner's Manual contains instructions on using Program Change messages to select sounds
in a separate MIDI sound module.
However, some sound modules have more than
128
sounds. The GS Format Sound Selection
was developed to allow MIDI users access to more sounds.
Rodgers is the first manufacturer in the organ market
to
introduce this powerful capability. By
following these steps, you will be able
to
put this exciting feature
to
work.
How
does
GS
Format Work?
In the past, MIDI has used
128
Program Change messages to select sounds. Each
of
these pro-
gram changes is still used in the GS Format; however,
128
Variation Select messages and
128
Variation Page messages are now used
to
select variations
of
each sound.
For instance, study the graph below:
128
j.
o
o
U
U
3
2
1
Pag 8
Pag 128
-#'
(Var CC-32)
65
4
3
2
1
L..-_-'--_--L.._--L._----J'--_..J..-_...J
Pag 0
~
128
o
....
co
>
Program
Changes
Sending a Program Change message by itself will select a sound
in
the lowest variation of voi-
ces, shown above with no shading. This variation
of
voices is often called "Variation 0". For instan-
ce, sending Program Change
#1
would select "Piano 1"; sending Program Change #4 would select
"Honky".
15
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