Hi Scott... It isn't really about playing two songs at the same tempo, it is about going from maybe one swing style to another without having the tempo jump, while playing the SAME song. In other words, if the chorus for a song sounds better with a different style to the style that best suits the verse, it is easier if you don't have to pre-program the tempo in BOTH styles. Just select the style on the fly, and Roland's make sure the tempo doesn't change to the default (unless you want it to!)...

It vastly increases your style choices for a song, without making you jump through hoops pre-programming tempos (and even that doesn't help if you decide to play it a little faster one night)....

And for dance medleys, if you come to the end of a waltz, want to immediately go to another waltz (but with a stop) and want to select a different waltz style, the tempo 'lock' avoids having to jack around with the tempo button before you can start...

[This message has been edited by Diki (edited 07-15-2007).]