# Pioneer DDJ-FLX4 CFX Button

**URL:** <https://community.algoriddim.com/t/pioneer-ddj-flx4-cfx-button/24601>\
**Category:** DJ Hardware\
**Tags:** macOS\
**Created:** [February 13, 2024, 9:37am UTC](https://community.algoriddim.com/t/pioneer-ddj-flx4-cfx-button/24601 "2024-02-13T09:37:33Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Slak\_Jaw](https://community.algoriddim.com/user_avatar/community.algoriddim.com/slak_jaw/32/6517_2.png) [@Slak\_Jaw](https://community.algoriddim.com/u/Slak_Jaw)\
**Post date:** [February 13, 2024, 2:01pm UTC](https://community.algoriddim.com/t/pioneer-ddj-flx4-cfx-button/24601/3 "2024-02-13T14:01:00Z")

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Hi @martinschki,

1. As @Andreas_Haase1 stated, Smart CFX is a Rekordbox specific feature.
2. In my personal custom MIDI Mappings, I usually map SHIFT+Headphone Cue to the Neural Mix/EQ Toggle.  
a. The MIDI command in djay is called **Toggle Neural Mix - EQ** and this toggles your controller EQ knobs between regular EQs and Neural Mix EQs.
3. @Michael_Wisniewski has made a custom FLX4 MIDI Mapping that you might want to check out: [DDJ-FLX4 MIDI Map (Unofficial 2.9)](https://community.algoriddim.com/t/ddj-flx4-midi-map-unofficial-2-9/22796)
4. Also, there is already a feature request topic enable mapping the FLX4 Smart Fader button to the djay CFX Toggle command: [DDJ-FLX4 - map Crossfader FX Toggle to Smart Fader button](https://community.algoriddim.com/t/ddj-flx4-map-crossfader-fx-toggle-to-smart-fader-button/23996)

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