ok, it took a while but i found something that could be the answer. I'll post it here in case anyonelse is intrested:
"Use a song setup. If you set the sounds you want on different tracks
of the sequencer, the keyboard is automatically routed through to the
channel/sound that is set for that track. It’s really easy, therefore, to
change tracks/sounds simply by positioning the cursor over the track number
and either dialing, entering or using the up/down buttons."
Thanks!
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