Posted 3 Months, 1 Week ago Gastrok Junior Boarder Posts: 35   ahh i need to know how to work the MIDI IN port Boss Dr550 Mk2 drum machine... i already know about how it sends an shit i jus need to know how to make the dr550 recive midi info thx in advance - john The administrator has disabled public write access. Posted 3 Months, 1 Week ago Chainsaw Junior Boarder Posts: 37   When all else fails - re-read the manual, (OR e-mail Roland)..... The administrator has disabled public write access.