- u -

• Undo : ArdourSurface::FaderPort , ArdourSurface::LP_X::LaunchKey4 , ArdourSurface::M2Contols , ArdourSurface::NS_MCU::Button , ArdourSurface::Push2
• UnFrozen : ARDOUR::Track
• Unhandled : ArdourSurface::OSC
• UNHANDLED_TAG : Gtk::BuilderError
• UniformWhiteNoise : ARDOUR::DSP::Generator , ARDOUR::DummyAudioPort
• UNKNOWN : Gtk::RecentManagerError
• UNKNOWN_TYPE : Gdk::PixbufError
• Unset : ArdourSurface::FP8::FaderPort8
• UNSUPPORTED_OPERATION : Gdk::PixbufError
• unused2 : ArdourSurface::Push2Knob , ArdourWidgets::ArdourKnob
• unused3 : ArdourSurface::Push2Knob , ArdourWidgets::ArdourKnob
• unused4 : ArdourSurface::Push2Knob , ArdourWidgets::ArdourKnob
• unused5 : ArdourSurface::Push2Knob , ArdourWidgets::ArdourKnob
• Up : ArdourSurface::LaunchPadPro , ArdourSurface::LP_X::LaunchKey4 , ArdourSurface::LP_X::LaunchPadX , ArdourSurface::Push2
• UP : Editor
• Updated : ARDOUR::PluginScanLogEntry
• Uploading : ARDOUR::ExportStatus
• Upper1 : ArdourSurface::Push2
• Upper2 : ArdourSurface::Push2
• Upper3 : ArdourSurface::Push2
• Upper4 : ArdourSurface::Push2
• Upper5 : ArdourSurface::Push2
• Upper6 : ArdourSurface::Push2
• Upper7 : ArdourSurface::Push2
• Upper8 : ArdourSurface::Push2
• URI : ARDOUR::Variant
• Use : ARDOUR::TriggerBox::Request
• UseGroup : PBD::Controllable
• User : ArdourSurface::FaderPort , ArdourSurface::NS_MCU::Button , ArdourSurface::Push2
• UserA : ArdourSurface::NS_MCU::Button
• UserB : ArdourSurface::NS_MCU::Button
• UserDown : ArdourSurface::CC121