# APC40 mapping help

**URL:** <https://forum.djtechtools.com/t/apc40-mapping-help/44891>\
**Category:** Controller Mappings\
**Tags:** apc40-mapping\
**Created:** [July 20, 2012, 2:06am UTC](https://forum.djtechtools.com/t/apc40-mapping-help/44891 "2012-07-20T02:06:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![DexterBee](https://avatars.discourse-cdn.com/v4/letter/d/53a042/32.png) [@DexterBee](https://forum.djtechtools.com/u/DexterBee)\
**Post date:** [July 20, 2012, 2:06am UTC](https://forum.djtechtools.com/t/apc40-mapping-help/44891/1 "2012-07-20T02:06:07Z")

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**APC40 mapping help**

I mapped the top row of knobs on my apc40 to control the highs on traktors mixer. I also mapped the [scene launch] button as “shift,” and when pressed, the top row of knobs control the gain, one for each deck.

The problem that I am experiencing is that when I turn one of the knobs, it controls the highs for that particular deck perfectly, but when I hold shift and try to control the gain, the highs and gain are moving at the same time. Why does this happen and what can I do to correct this???

I am completely new to traktor, and extremely new to this whole mapping thing, so I’d like to understand the workings of whats going on.lol. Thanks!😃

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**Author:** ![Stewe](https://sea1.discourse-cdn.com/flex001/user_avatar/forum.djtechtools.com/stewe/32/14607_2.png) [@Stewe](https://forum.djtechtools.com/u/Stewe)\
**Post date:** [July 20, 2012, 9:32am UTC](https://forum.djtechtools.com/t/apc40-mapping-help/44891/2 "2012-07-20T09:32:07Z")

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Hey Dexter,

I guess your shift look like this:

Add in modifier 1  
Type of controller - Button  
Interaction mode - Hold  
Set to value - 1

For EQ highs adjust modifier condition set M1=0  
For Gains adjust modifier condition set M1=1

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<div class="post-metadata">

**Author:** ![DexterBee](https://avatars.discourse-cdn.com/v4/letter/d/53a042/32.png) [@DexterBee](https://forum.djtechtools.com/u/DexterBee)\
**Post date:** [August 2, 2012, 11:41pm UTC](https://forum.djtechtools.com/t/apc40-mapping-help/44891/3 "2012-08-02T23:41:41Z")

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> [@Stewe](#):
>
> Hey Dexter,
> 
> I guess your shift look like this:
> 
> Add in modifier 1  
> Type of controller - Button  
> Interaction mode - Hold  
> Set to value - 1
> 
> For EQ highs adjust modifier condition set M1=0  
> For Gains adjust modifier condition set M1=1

Thanks! It works like you said.