In yamaha keyboards is possibly to do that operation because they use the 16 Channels of midi . They program in the casm info of a channel and mute some chords for major intro secuence or minor and redirect the channel to the Main channel used for the style, thats mean the info recorded in channel 1 to 8 is redirected to Channels 9 to 16 (recognized rhythm Channels). Casio RHYTHM permits that too, but casio must free the software.
Not even in the mzx500 making a rthym from a midi dont permit this advanced options. And for the Price of this keyboard, this advaced options must be present.馃様