The '''HUI MIDI mapping protocol''' is a proprietary [[communications protocol]] for interfacing between a hardware [[audio control surface]] and [[digital audio workstation]] (DAW) software. The protocol allows a DAW and a connected hardware control surface to exchange [[MIDI]] signals that synchronize the states of their (virtual) sliders, buttons, wheels, and displays. The user can write [[console automation]] which can then be seen in the DAW.<ref>{{cite book |last1=Thompson |first1=Daniel M. |title=Understanding Audio: Getting the Most Out of Your Project or Professional Recording Studio |date=1 August 2018 |publisher=Berklee Press |___location=Boston, MA |isbn=978-1-4950-2875-5 |page=280 |edition=2nd |url=https://books.google.com/books?id=oHxuDwAAQBAJ&pg=PA280&lpg=PA280&dq=human+user+interface+hui+protocol&source=bl&ots=z6ePLwy7LK&sig=LKwEj0t-uCvNeLFWq29k1GSKQeI&hl=en&sa=X&ved=2ahUKEwjPr-O5idLfAhUEooMKHaBRCO84ChDoATAJegQIAhAB#v=onepage&q=human%20user%20interface%20hui%20protocol&f=false |accessdate=3 January 2019}}</ref>
CreatedThe HUI protocol was created jointly by [[Mackie]] and [[Digidesign]] in 1997 for Mackie's Human User Interface (HUI), the first hardware control surface for Digidesign’s [[Pro Tools]]. It is now used very widely. Many hardware controllers from manufacturers such as [[Solid State Logic]], [[Yamaha Pro Audio|Yamaha]], [[TASCAM]], [[Novation Digital Music Systems|Novation]] implement this protocol. By the time Mackie introduced the Baby HUI in August 2002, the protocol was also supported by a growing family of DAWs, including [[Mark of the Unicorn|MOTU]] [[Digital Performer]] and [[Steinberg Nuendo]], making them cross-compatible with HUI-compatible hardware controllers.<ref>{{cite book |last1=McGuire |first1=Sam |title=Modern MIDI: Sequencing and Performing Using Traditional and Mobile Tools |date=17 December 2013 |publisher=Focal Press |___location=Abdingdon, Oxon |isbn=978-0-415-83927-3 |page=62 |url=https://books.google.com/books?id=_7xiAgAAQBAJ&printsec=frontcover#v=onepage&q&f=false |accessdate=3 January 2019}}</ref>
It is now used very widely. Many hardware controllers from manufacturers like [[Solid State Logic]], [[Yamaha Pro Audio|Yamaha]], [[TASCAM]], [[Novation Digital Music Systems|Novation]], implement this protocol. Similarly many types of DAW software implement the HUI protocol, making them cross-compatible with the HUI-compatible hardware controllers.<ref>{{cite book |last1=McGuire |first1=Sam |title=Modern MIDI: Sequencing and Performing Using Traditional and Mobile Tools |date=17 December 2013 |publisher=Focal Press |___location=Abdingdon, Oxon |isbn=978-0-415-83927-3 |page=62 |url=https://books.google.com/books?id=_7xiAgAAQBAJ&printsec=frontcover#v=onepage&q&f=false |accessdate=3 January 2019}}</ref>
While HUI is still supported on the hardware side, non-Digi software has moved on to more open MCU and other MIDI control protocols as Digidesign (now Avid) has made extensive controllers with proprietary protocols that have much more rich capabilities but are part of a closed system.
