Here is some more info. about how the motif's arpeggio function: The (Motif XS) has four independent arp generators, each arp can be set to transmit via a midi out channel (i.e. arp1 on Ch 1, arp 2 on Ch 2, Arp 3 on Ch 3, Arp 4 on Ch 4). In LP8 I have set up four tracks each receiving the arp on the corresponding channel (1,2,3,4) I also have enabled the option : "Auto demix by channel if multitrack recording", which is found in File > Project Settings > Recording> " in LP8. So, if this was to work properly (but so far it has not), I would end up with four Logic midi tracks, that contain the arpeggios that were sent by the Motif. I can then turn Local (OFF) on the Motif, and set the proper port to Motif's USB Port. and disable the Motif Arps, and play the arp midi data from LP8, which will trigger the motif's sounds. My guess is that there is still a midi loop issue, which is going back to the Motif. Do you think there might be a need to do some additional customization in the (Environment Window) to resolve this issue ? or is LP8 capable of handling this without going into that extra step ? I hope this additional info is helpful. Thank You.