NewYorker,
With the drum machine you don't switch between variations like on an arranger.. The drum machine calls it song mode, and what you're really doing is chaining your patterns you create.... You can have fills and quite a few different variations.. All drum machines differ in the amount of user patterns you can have, but most are 50+ With the drum machine you have to map out the drum track entirely by chaining the patterns until you've completed the drum track itself.. I'm sure you can still use the fill buttons on the arranger in sync with the drum machine.. Keep in mind that when you're using the drum machine, you're not using any space on your keyboard for your percussion tracks. The drum machine is just programed to play along with your keyboard. Just be sure to either (mute) or turn the volume completely down on tracks 9 and 10 of the PSR.. Hope this made sense...