Matteo,

With the 1500 you, and most other keyboards, you can use both registrations and gig disks, and both can be stored on the USB storage device or smart media card. Access time is just one second at most, which is plenty fast enough. Additionaly, you can store a number of songs on your Music Finder Directory and make custom MFDs that will be similar in many ways to registrations. Lots of options to work with, all of which will provide you with seamless entertainment capabilities.

Good Luck,

Gary