Yamaha DDK-7 Owner's Manual page 63

Rhythm Structure
Each rhythm is made up of "sections." Since each section is a rhythmic variation of
the basic rhythm, you can use them to add "spice" to your performance and mix up
the beats while you are playing. You can freely change the section while the rhythm
is played back.
INTRO
This is used for the beginning of the song. There are three Intro sections that can be
selected with INTRO [1] – [3] buttons. When the Intro finishes playing, the
rhythm automatically shifts to the Main section.
5
Selected Intro section's lamp is lit
MAIN
This is used for playing the main part of the song. There are four Main sections that
can be selected with MAIN/FILL IN [A] – [D] buttons. The rhythm pattern of
several measures repeats indefinitely.
Selected Main section's lamp is lit
FILL IN
This is designed for use as a temporary and regular rhythmic pattern to spice up a
repeating rhythm. There are four Fill In sections that can be played by pressing the
selected (lit) MAIN/FILL IN [A] – [D] buttons as desired. When one measure
pattern of Fill In finishes playing, the rhythm is automatically shifts to the Main
section.
Selected Fill In section's lamp flashes
DDK-7 Owner's Manual 63