Linking two knobs together

sarahmeyz

Hi there,

I am trying to link two knobs together in Kontakt, but haven't had much luck with it yet.

Would someone have any good direction for me to go to?

PS: my knobs are declared as sliders, so I can add my own knob design to them:

declare ui_slider $knob(100000,500000)

set_knob_defval($knob, 500000)

    
$knob := 500000

move_control_px($knob,100,70)

make_persistent($knob)




declare $knobId

$knobId := get_ui_id($knob)

set_control_par_str($knobId, $CONTROL_PAR_PICTURE,"knob")

set_control_par($knobId, $CONTROL_PAR_MOUSE_BEHAVIOUR, -1000)

My idea is to create a link button, so when I press it, knob 1 and knob 2 will move together, linked.

theodorech

You'll want to mirror the values of one knob to the other whenever the link_button is set to 1. Also, don't forget to copy the set_engine_par part into both knob callbacks.

Here’s a quick example:

on ui_control (knob_1)

if link_button # 0

knob_2 := knob_1

set_engine_par(<knob_2 engine parameters>)

end if
set_engine_par(<knob_1 engine parameters>)

end on

on ui_control (knob_2)

same logic as above

end on

sarahmeyz

https://community.native-instruments.com/discussion/comment/185534#Comment_185534

Thank you! This worked great!

I'm still trying to understand why there's a set engine par for knob 1 after end if, and before end on

end if
set_engine_par(<knob_1 engine parameters>)

end on

But it did work for what I wanted to do! Just wanted to fully understand the code.

Thank you again.

sarahmeyz

Just to complement my comment, when I used it for my simple test script, it worked perfectly.

But then when I was trying to mirror two slider values that have multiple set_engine_par parameters assigned to it (from different groups), it doesn't seem to work :/

Would like to understand the code for mirroring values, so I can adjust to mine.

Thank you for your help!

theodorech

The same approach can be used for as many set_engine_par lines as you want. Here's an explanation of the code:

on init

declare ui_slider $knob_1(0,1000000) {Declare the first knob}

make_persistent($knob_1) {make it persistent so it keeps its value whenever we restart the engine}

declare ui_slider $knob_2(0,1000000)

make_persistent($knob_2)

declare ui_button $link_button {declare link button}

make_persistent($link_button)

end on

on ui_control($knob_1)

set_engine_par($ENGINE_PAR_CUTOFF,$knob_1,0,0,-1) {control the cutoff values of the first group}

if ($link_button # 0) {if link button is not equal to 0}

$knob_2 := get_control_par(get_ui_id($knob_1),$CONTROL_PAR_VALUE) {transfer knob's 1 values to knob 2}

set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,1,0,-1) {sets the cutoff values to group 2}

end if

end on

on ui_control($knob_2)

set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,1,0,-1) {control the cutoff values of the second group}

if ($link_button # 0) {if link button is not equal to 0}

$knob_1 := get_control_par(get_ui_id($knob_2),$CONTROL_PAR_VALUE) {copy the knob's 2 values to knob 1}

set_engine_par($ENGINE_PAR_CUTOFF,$knob_1,0,0,-1) {set the cutoff values to group 1}

end if

end on

on ui_control($link_button)

if ($link_button # 0) {copy the values of the first knob to the second whenever you click the link button}

$knob_2 := get_control_par(get_ui_id($knob_1),$CONTROL_PAR_VALUE)

set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,1,0,-1)

end if

end on

In the example above, the main set_engine_par is placed before the if statement, but you can totally put it after the if statement as well.

For future reference:
set_engine_par(<parameter>, <value>, <group>, <slot>, <generic>)

sarahmeyz

https://community.native-instruments.com/discussion/comment/185685#Comment_185685

Thank you very much for the detailed explanation! I appreciate it.

If I were to add a third knob, to link with the other two, would I have to then mirror all of them like this:

on init

declare ui_slider $knob_1(0,1000000)

make_persistent($knob_1) 


declare ui_slider $knob_2(0,1000000)

make_persistent($knob_2)


declare ui_slider $knob_3(0,1000000)

make_persistent($knob_3)


declare ui_button $link_button

make_persistent($link_button)

end on

on ui_control($knob_1)

set_engine_par($ENGINE_PAR_CUTOFF,$knob_1,0,0,-1) 
if ($link_button # 0) 

$knob_2 := $knob_1

set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,1,0,-1) 

end if

end on


on ui_control($knob_2)

set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,1,0,-1) 
if ($link_button # 0)

$knob_1 := $knob_2

set_engine_par($ENGINE_PAR_CUTOFF,$knob_1,0,0,-1)

end if

end on


on ui_control($knob_3)


set_engine_par($ENGINE_PAR_CUTOFF,$knob_3,1,0,-1) 
if ($link_button # 0)

$knob_2 := $knob_3

set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,0,0,-1)

end if

end on


on ui_control($link_button)

if ($link_button # 0)

$knob_2 := $knob_1
$knob_2 := $knob_3
$knob_1 := $knob_2
$knob_1 := $knob_3


set_engine_par($ENGINE_PAR_CUTOFF,$knob_2,1,0,-1)
set_engine_par($ENGINE_PAR_CUTOFF,$knob_3,1,0,-1)

end if

end on

When I add the above code, all I can get is knob_1 and knob_2 are linked, and knob_2 and knob_3 are linked, but not all three of them together.

Thank you again!

theodorech

You'll want to link all the knobs so they move together whenever the link button is on. Right now, each knob callback only links two knobs at a time (like knob 1 and 2, or knob 2 and 3). The solution is already there, you just need to copy and tweak a specific part of the code above 😊