My interest in the "Korg DBs" has picked up again recently. As has already been mentioned (to some extent), they are the DB equivalents of Korg's AG-10, "Audio Gallery" sound module.
While the Korg DBs are very-much General MIDI focused, classifying them as as "GM-only" seems like a bit of a disservice. Not unlike some of the advanced functionality found with Yamaha's XG devices, there are a number of available features and CCs that fall outside of the GM specification, in addition to SysEx programmability that allows a single "Program" to be created using all of the available synth parameters (selectable as Bank 62/00, Program 97).
X Technology included Korg's own AG-10 Sound Editor with the TopWave 32, along with a number of supporting utilities. While simple looking, this editor is remarkably comprehensive, as (hopefully) evidenced by the screenshot below. Additionally, ".AG" configuration files are included for each of the 128 General MIDI instruments (to be used as templates, if desired), and X Technology also helpfully included a program that performs conversion to SysEx, allowing this data to be easily included in MIDI sequences.

Korg's own AI2 demonstration sequences really show-off the potential of the Korg chipset to great effect. Here are recordings of those sequences, as played-back using a Media Vision "Pro Wave" version of the DB, housed in a DoX-BoX enclosure:
WILD CAT (AI_DEMO1.MID)
RED GIANT (AI_DEMO2.MID)
CLASITARIO (AI_DEMO3.MID)
Interestingly enough, there really isn't any advanced functionality being exploited in the demonstration sequences. Rather, they simply exemplify great MIDI programming, tailored to the strengths (and effect capabilities) of the Korg-based devices.
Special thanks to Chiel Kersten ("CHiLL72") for providing the TopWave 32 diskette contents.