Midi Channel - Rodgers Trillium T967 Owner's Manual

The GS Format, for example, uses MSB for Bank Select. This also means that, when the
Tone Names parameter is set to GS, the LSB field cannot be altered, since this message
is not used.
The General MIDI, or GM, standard uses Program Changes only; no Bank Select
messages are used. When the Tone Names parameter is set to GM, neither the MSB or
LSB fields can be altered.
When Tone Names are set to OFF, then all messages (Program Change, MSB and LSB)
can be selected and changed in the console display.
See "Tone Names" on Page 78 for more information.
Also, consult the owner's manual for your particular MIDI sound module if you have
questions about what messages are used to select sounds.
General MIDI and GS Format
In the past, most MIDI sound modules provided a maximum of 128 sounds. These were
selected by using MIDI Program Change messages. Unfortunately, there were no
standard sound assignments for those messages. For example, one sound module may
have had a trumpet on Program Change #39, yet another sound module would have
chimes on #39.
With the creation of General MIDI (GM), a standard list of 128 sounds was defined, each
of which corresponds to one of the 128 available Program Change messages.
The GS Standard honors that same standard list of GM sounds, but also allows access to
more than those 128 sounds through the use of Bank Select messages (using the MSB
commands). The GS Standard adds the ability to select up to 128 "Variations" of each of
the 128 standard GM sounds, expanding the total number of possible sounds to 16,384.
For example, Program Change #1 in a GM module specifies Piano 1. A GS module will
also have Piano 1 for Program Change #1 but, in addition, can have 127 other variations
of that particular sound.
The GM instruments are often referred to as "Bank 0" sounds; the GS variations of that
sound will be in other Banks: Bank 8, Bank 16, etc.
Many manufacturers of MIDI sound modules have added – or will soon add – support for
GS Format.

MIDI Channel

Each of the T967 MIDI Couplers can control a different tone. This is accomplished by using
separate MIDI Channels. Because the channels are independent, the instruments can be
controlled individually. Moreover, since there are two MIDI couplers each for the Great,
Swell, Pedal and Choir, you can layer two sounds on each manual and in the Pedal.
Please note that these MIDI couplers are not affected by the organ's intermanual or
intermanual couplers; for example, activating the Swell to Great 8' coupler will not cause
the Swell MIDI couplers to play from the Great keyboard.
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