Here are the main things you have to setup in order to split the keyboard. There are many more settings and possibilities than I have listed here, but these steps should get you started.
Some things to note first,
On the right side of the console are two rows of buttons.
Above the top row of buttons and below the bottom row of buttons are descriptions indicating each button’s alternate function. The functions you need correspond to MIX.
1) Begin by selecting MIX mode (under the Play Mode functions at right of LCD display)
2) Use the Bank and Value buttons to select the USER bank, Program 00 (Multitmbral)
3) Press the Page button until you see CH1 in the display (top left)
4) Set the Program you want to use for this channel. For this example use button 40 (Sharpstick bass)
5) Press the Edit Select button
6) Select Channel 1 (lower row, button 0)
7) Press Level (top row, button 60). If the display reads “Program Enable: OFF”, use the Value buttons to toggle it to ON.
8) Press Keyboard (top button 90). Similarly, set to ON
Next is where you set up the split for this channel
9) Press Range (110)
10) Set the Low Limit for channel 1 (bass for this example) by holding 110 and pressing
the lowest note you want the use on the bass range. For this example use your keyboards lowest key
11) Press the page button to display the Hi Limit. Use the same procedure to set the top of the range. For this example set it to B below middle C
Now you have the bass setup
Press MIX to get you back to the top
To setup the Organ,
Repeat steps 3 through 11 for CH2 except set the program to 20 (Organ) in step 4 and,
for steps 8 and 9, set the Lo Limit to middle C and the Hi Limit to your highest note.
****Do not exit the MIX mode at any time during this procedure as you will lose all your changes and have to start over****
The Multitmbrl mix is kind of a mix scratch pad so don’t hesitate to save the new settings there, you can always change them again.