Human User Interface Protocol

HUI protocol allows a digital audio workstation (DAW) and a connected hardware control surface to exchange MIDI signals that synchronize the states of their sliders, buttons, wheels, and displays. The user can write console automation which can then be seen in the DAW.{{cite book|url=https://books.google.com/books?id=oHxuDwAAQBAJ&dq=human+user+interface+hui+protocol&pg=PA280|title=Understanding Audio: Getting the Most Out of Your Project or Professional Recording Studio|last1=Thompson|first1=Daniel M.|date=1 August 2018|publisher=Berklee Press|isbn=978-1-4950-2875-5|edition=2nd|location=Boston, MA|page=280|access-date=3 January 2019}} It includes support for 10-bit/1,024 discrete values.{{Cite web|url=https://www.mixonline.com/recording/taking-daw-control-365562|title=Taking (DAW) Control|last=Lambert|first=Mel|date=2017-11-15|website=Mixonline|language=en-us|access-date=2019-05-16}}

The HUI protocol was created jointly by Mackie and Digidesign in 1997 for Mackie's Human User Interface (HUI), the first non-Digidesign hardware control surface for Digidesign’s Pro Tools.{{Cite web|url=http://www.protoolsproduction.com/control-pro-tools-daw-controller/|title=Taking Control of Pro Tools with a DAW Controller|date=2017-02-16|website=Pro Tools Production|language=en-US|access-date=2019-05-16}}{{Cite book|url=http://www.synthmanuals.com/manuals/mackie/hui/owners_manual/hui_om.pdf|title=HUI - Human User Interface for Digital Audio Workstations - Reference Guide|publisher=Mackie Designs Inc.|year=1998|location=USA}} It was subsequently implemented by hardware controllers from manufacturers such as Solid State Logic,{{Cite web|url=https://www.solidstatelogic.com/studio/aws/daw-control|title=DAW Control {{!}} Solid State Logic|website=Solid State Logic|access-date=2019-05-16}} Yamaha, TASCAM, and Novation.

By the time Mackie introduced the Baby HUI in August 2002, the protocol was also supported by DAWs including Digital Performer and Nuendo, making them cross-compatible with HUI-compatible hardware controllers.{{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 |access-date=3 January 2019}} Other DAWs to support HUI protocol include Logic Pro,{{Cite web|url=https://www.soundonsound.com/reviews/presonus-faderport|title=PreSonus FaderPort|website=SoundOnSound|access-date=2019-05-16}} REAPER,{{Cite web|url=http://support.novationmusic.com/hc/en-gb/articles/206863679-Compatible-software-for-Automap-Using-Automap-for-DAW-control|title=Compatible software for Automap: Using Automap for DAW control|website=Novation|language=en-GB|access-date=2019-05-16}} and Cakewalk Sonar.{{Cite web|url=https://homerecordingpro.com/best-daw-controllers/|title=The 5 Best DAW Controllers|date=2018-03-21|website=Home Recording Pro|language=en-US|access-date=2019-05-16}}

In 2003, the Mackie Control Universal (MCU) protocol was introduced, combining together functionality from Mackie Control, Logic Control and HUI into a single protocol.{{Cite web|url=https://www.soundonsound.com/reviews/mackie-control-universal|title=Mackie Control|website=SoundOnSound|access-date=2019-05-16}} DAWs which support MCU (in addition to those which support HUI) include Ardour,{{Cite web|url=https://manual.ardour.org/using-control-surfaces/devices-using-mackielogic-control-protocol/|title=Ardour Documentation: Devices Using Mackie/Logic Control Protocol|access-date=2020-07-28}} Ableton Live, Studio One, Cubase, and Reason. ACID Pro 9 and ACID Pro Next from MAGIX also support MCU.{{Cite web|url=https://www.harmonycentral.com/articles/how-to-use-mackie-compatible-controllers-with-daws|title=Article: How to Use Mackie-Compatible Controllers with DAWs|last=Anderton|first=Craig|date=2014-03-21|website=HarmonyCentral|access-date=2019-05-16}} An Arduino library has also implemented a large portion of MCU, enabling control surfaces to be built with Arduino-compatible microcontrollers.{{Cite web |last=P |first=Pieter |date=2022-04-25 |title=Control Surface |url=https://github.com/tttapa/Control-Surface#midi-control-input |access-date=2022-04-25 |website=GitHub}}

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Category:MIDI standards