
42 Chapter1ControlSurfaceSetup
IfthemessagedoesnotcontainLo7orHi7placeholders,anincomingvalueof1is
assumed.Thisistypicalforpressedorreleasedbuttons.Alsoseethe“Multiply”section
below.
Touch/Release
TheincomingMIDImessage(s)causesachangeinthetouched/releasedstatusofthe
destinationparameter.Anonzerovaluemeanstouched;avalueof0meansreleased.
ThemessagesaredisplayedandenteredinthesamewayastheValueChangefield(see
the“ValueChange”sectionabove).
Note:ThisonlyappliestotheTrackassignmentclassandparametersthatcanbe
automated.
Min/Max
DefinestheminimumandmaximumrangeforincomingvaluesrepresentedbyLo7
andHi7.Typically,thefullrangeof0–127isused,butsomecontrolsurfacesmayusethe
samemessagewithdifferentvaluerangesfordifferentcontrols(CMLabsMotorMix,for
example).
Format
Definesthewaynegativevaluesareencodedinthe7-bitportionssentoverMIDI.You
canchoosebetweenthefollowingoptions:
 Unsigned—Nonegativevaluesarepossible.Thefull7or14bitrangeistreatedasa
positivenumber.Thisresultsinavaluerangeof0to127 or0to16383.
 2'scomplement—Ifthemostsignificantbitisset,thevalueisnegative.Toobtainthe
absolutevalue,invertallbitsandadd1.Thisresultsinavaluerangeof–128to127 or
–8192to8191 .
 1'scomplement—Ifthemostsignificantbitisset,thevalueisnegative.Tosetthe
absolutevalue,invertallbits.Notethatthisallowstwopossibleencodingvaluesfor
zero.Thisresultsinavaluerangeof–127to127or–8191to8191 .
 SignMagnitude—Ifthemostsignificantbitisset,thevalueisnegative.Tosetthe
absolutevalue,clearthemostsignificantbit.Notethatthisallowstwopossible
encodingvaluesforzero.Thisresultsinavaluerangeof–127to127or–8191to8191 .
Theappropriateformatthatshouldbeusedisusuallydocumentedinyourcontrol
surfaceusermanual.Ifunavailable,checkthecontrolsurfacemanufacturer’swebsite,
orcontactthemviaphone.
Multiply
Allowstheincomingvaluetobescaled.Especiallyusefulforbuttonpressesthathavea
valueof1.Examples:tosettheautomationmodetoWrite,setMultiplyto4.00and
ModetoDirect.Todecrementaparameterby1withabuttonpress,setMultiplyto
−1.00andModetoRelative.The1and–1menuitemsinthecombobox’smenu
convenientlyenterthemostcommonlyusedvaluesof1and–1
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