Keyboard Drum Rolls

[Ben Bol]

Hi friends,
I do solo performances using a yamaha psr ew410 n a midi controller n ipad air2. Anyone knows if there is a foot pedal I could use to trigger the drum rolls (instead of using my hand) and what setup would I need? Thanks.
Benito

 

[Ben Bol]

I meant to say when I created the styles, i also created drum rolls on the yamaha keyboard. It's those drum rolls I'm referring to