Emu XL-7 & MP-7 User's Group

ok. now its work on my arduino. i can change preset arp parameters for current preset.
but would be nice to control several channels simultaneously.

oh god i found bad news on page 333 in XL7 manual ((((

(There is only one edit buffer which is used by the current preset (the preset shown in the display). You can edit only one preset at a time via SysEx commands, although these presets can be edited independently of the current preset edited using the Front Panel. Remote Preset selection is independent of the edit buffer. Changing the current preset erases the edit buffer.)

maybe it is possible via CC messages???