Kbd Set (KS) is another excellent feature 
of the i30. It enables you to "call up" a 
set of sounds including volumes/pan/mix 
etc at any time - even during playing an 
ARANGEMENT. I use this a lot - here's 
an example of use:

1. Assume you are using an ARRANGEMENT 
with MAIN kbd=sax, SUB kbd=piano, 
LOWER kbd=nstrings
2. During playing this arrangement, you 
wish to instantly change those settings to 
MAIN=vibes, SUB=Jazz gtr, LOWER=choir.
3. To achieve this you must create a Keyboard 
SET with all those settings (in 2. above)
this is how to do it.
4. Select any arrangement
5. Set Main=vibes,SUB=jazzgtr,LOWER=choir
6. Set all volumes, panning etc for the sounds 
as you want them to be.
7. Write keyboard set (eg as KS 21)
8. Save the keyboard set to disk (xxx.ARK file) - 
part of your xxx.SET
9. Now call up your ARRANGEMENT to play.
10. start playing
11. select KS 21 at any time and the sounds will 
change exactly as you set up in the KS. 

Selecting a keyboard set does not change your 
style, tempo, key etc or arrangement (unless you 
write it).

Hope this helps

Pete

P.S.   ... when you write the KS, you will see 
a list of all the i30 settings that are writtenin a 
KS. There is more than just sounds & mixes. 
Really, the KS feature is just like the older 
keyboard "registrations" - Korg have supplied 
this feature to enable us to quickly change 
instruments whilst playing and save us some 
keystrokes. You can leave the KS screen on 
the display whilst playing, and just enter the 
different KS numbers you want at any time - 
this is a truly great performance feature. I 
even use this to change octave settings 
(same sound).

Another reason not to jump to the PA80??? 
(just stirring - LOL!!!)

Pete