KISS is an acronym for “Keep It Simple, Stupid” as a design principle noted by the KissBox is one of the frontrunners when it comes to transporting the Midi Missing: S The concept is based on the use of the KissBox RTP-MIDI OEM board . It's easy to imagine a box with 16 physical MIDI ports that transforms. RTP-MIDI (also known as AppleMIDI) is a protocol to transport MIDI messages within RTP . KissBox produces an RTP-MIDI OEM module, an external communication processor board, which connects over an SPI bus link. . bits encoding of USB MIDI Class can represent up to 16 endpoints using the Cable Identifier field.