M2-111-UM_v1-0_Get_and_Set_Device_State.pdf

The Property Exchange Resources described in this document allow for an Initiator to send or receive Device State, or in other words, to capture a snapshot which might be sent back to the Device at a later time. The primary goal of this application of Property Exchange is to GET the current memory of a MIDI Device. This allows a Digital Audio Workstation (DAW) or other Initiator to store the State of a Responder Device between closing and opening of a project. Before a DAW closes a project, it performs the GET inquiry and the target Device sends a REPLY with all data necessary to restore the current State at a later time. When the DAW reopens a project, the target Device can be restored to its prior State by sending an Inquiry: Set Property Data Message.