This document describes General MIDI (GM Mode), a new feature included with Version 4 of the K2600 Operating
System. To get started with GM Mode, you must first use the Boot Loader to install the Version 4 software on your
K2600. This procedure is described in Appendix A of the K2600 Musician’s Guide.
You must perform a hard reset after you install this new operating system.
What it is
Version 4 of the K2600 Operating System introduces GM Mode, an efficient way to use your K2600 with General
MIDI devices and sequences. Since you can turn GM Mode on or off in a single step, you can easily move between
the K2600’s normal operating mode and GM Mode. The K2600 remembers your Master table settings, so when you
leave GM Mode to return to normal operating mode everything is right where you left it.
GM Mode is optimized for use with the K2600 ROM 5 and Orchestral ROM options. Installing these optional
soundsets in your instrument is your best bet for top-notch GM sounds. You may, however, take advantage of GM
Mode without installing the option ROMs. See “Using GM Mode without ROM5 and Orchestral ROM,” below, for
more information.
About GM
General MIDI (GM) is an addition to the original MIDI specification that assigns sounds to specific channel numbers, program numbers, and note values. Using General MIDI, you can share song files between different devices
with reasonably consistent performance.
Many GM song files are commercially available, and they’ll sound great on your K2600.
2003, All Rights Reserved. Kurzweil is a product line of Young Chang Co., Ltd. Kurzweil, K2600, LaserVerb, KDFX, and
V.A.S.T. are trademarks of Young Chang Co., Ltd. All other trademarks and registered trademarks are the property of their
respective owners. Product features and specifications are subject to change without notice.
Part No. 910386, Rev. B
K2600 Version 4 (GM Mode) User’s Guide
Inside GM Mode
Inside GM Mode
Here’s what happens when you enable GM Mode:
•On all channels except channel 10 (which GM uses for drums), you will see only the 128 GM
programs. On MIDI channel 10, you will see the eight drum kits. (If you do not see the GM programs
when you turn on GM Mode, you need to install ROM5 or load one of the disk file GM sets.)
•The K2600 will modify the following entries in the master table:
• FX mode (GM uses Master mode)
• FX channel (GM uses None)
• FX studio (GM uses the studio selected in GM Studio set on the Master: GM page)
Old settings will be remembered, however, so that when you turn GM Mode off the K2600 will
restore your previous settings.
•Volume and expression controllers are mapped to a special GM curve, as in “GS” synths. (GS is a
superset of General MIDI that is used by the Roland Sound Canvas and other products.)
•GM drum kits are mapped across program number space as in the “GS” synths, and have exclusive
zones included with them.
•Program changes sent to the K2600 when it is in GM Mode will only select programs from the GM
program set.
Setups, Songs, and QA Banks created outside of GM Mode will not point to the correct programs within GM
Mode (although you may find the results “interesting”).
Similarly, Setups, Songs, and QA Banks created within GM Mode will not point to the correct programs when you
leave GM Mode. For this reason, when you create Setups, Songs, or QA Banks within GM Mode you may want to
append the letters “GM” to the object’s name and/or store the objects only in certain banks.
Using GM Mode without ROM5 and Orchestral ROM
While you’ll attain the best-sounding GM soundset if you install ROM5 and the Orchestral ROM in your K2600,
you can also take advantage of GM Mode with one of the GM soundsets downloadable from the
www.kurzweilmusicsystems.com website. There are several GM soundsets available, depending on which option
ROMs you have in your K2600. If you have previously obtained a GM soundset for your K2600, you will have to
get the new version that is designed to work with GM Mode.
If you choose this approach, first upgrade your operating system to Version 4. Then load the GM soundset using
Disk Mode (make sure to load the GM disk sets as Everything-Merge files and verify that the programs have
loaded into banks 400-500s). Turn on GM Mode AFTER loading the disk set, then follow the instructions for GM
Mode in this document.
Master Table changes
With Version 4 of the K2600 Operating System, new items have been added to the Master Table. If you have previously created your own ROM program sets, we recommend that you make and load a new ROM set in order to
correctly store the new parameters with your favorite defaults.
You should also be aware that with Version 4 the Master Table has grown in size to accommodate GM parameters.
If you install an old (pre v4.0) Master Table as part of an object set, the K2600 will say “Resizing Master Table...” on
startup.
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K2600 Version 4 (GM Mode) User’s Guide
Enabling GM Mode from the Master page
Enabling GM Mode from the Master page
In the V4.0 K2600 operating system, the first Master page (MAST1) now has a GM soft button:
Enable GM Mode by setting the GM parameter to On. When GM is on, GM is displayed on the top line of the
screen. This happens on all of the K2600’s main pages.
The GM Studio parameter sets the FX Studio that will be used by GM programs. Six GM Studios are included,
providing different reverb and chorus-plus-reverb settings.
When you set GM On, the unit will put itself into GM Mode when the song starts, and get out of GM when the
song stops. The GM Mode setting will be saved with the song file.
GM Mode can also be turned on from an external MIDI device that sends the “General MIDI On” message as
defined in the MIDI Specification. When you insert a General MIDI On message at the beginning of a sequence you
are telling the playback device (e.g., K2600) to immediately start GM when you play the song. On pause, stop, or
end of song, GM Mode is turned off automatically.
In addition, when you import Standard MIDI Files (SMF) with the GM sysex embedded in them, the K2600 sets the
GM parameter in the song to ON. And when the K2600 exports a song to SMF with the GM parameter set, it
embeds the GM On sysex message.
The Sysex messages are:
GM ON
F0 7E UNIVERSAL NON-REAL TIME SYSEX HEADER
<device ID> ID of target device
09 GM Message
01 GM ON
F7 EOX
GM OFF
F0 7E <device ID> 09 02 F7
02 GM OFF
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General MIDI Programs
The table below shows the 128 General MIDI programs. The ID numbers shown are the locations that these programs will occupy in GM Mode. In Standard Mode the program numbers will be 400-527.
You can create your own GM sets as well, provided that you store the programs at 400-527 and the drum kits at
528-535.