# DDJ-FLX4 - map Crossfader FX Toggle to Smart Fader button

**URL:** <https://community.algoriddim.com/t/ddj-flx4-map-crossfader-fx-toggle-to-smart-fader-button/23996>\
**Category:** DJ Hardware\
**Tags:** macOS, iOS\
**Created:** [January 23, 2024, 7:44pm UTC](https://community.algoriddim.com/t/ddj-flx4-map-crossfader-fx-toggle-to-smart-fader-button/23996 "2024-01-23T19:44:04Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![Michael\_Wisniewski](https://community.algoriddim.com/letter_avatar_proxy/v4/letter/m/a88e4f/32.png) [@Michael\_Wisniewski](https://community.algoriddim.com/u/Michael_Wisniewski)\
**Post date:** [February 19, 2024, 6:48pm UTC](https://community.algoriddim.com/t/ddj-flx4-map-crossfader-fx-toggle-to-smart-fader-button/23996/14 "2024-02-19T18:48:12Z")

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> [@Chq](#):
>
> Where can the fx that could previously be activated with the Smart CFX button now be activated?

The Smart CFX button is still mapped in version 2.9 of the DDJ-FLX4 Unofficial MIDI Mapping. You can copy the settings from there.

> [@DDJ-FLX4 MIDI Map (Unofficial 2.9)](https://community.algoriddim.com/t/ddj-flx4-midi-map-unofficial-2-9/22796):
>
> [DDJ-FLX4 (Unofficial2.9).djayMidiMapping](https://community.algoriddim.com/uploads/short-url/1INOT5eScChcsl77DzxleY0LR3z.djayMidiMa) (79.9 KB) mapped Smart Fader button to use the Toggle Crossfader FX command. Notes: unfortunately the built-in FLX4 Algoriddim mapping restricts users from accessing the Toggle Crossfader FX command and the physical Smart Fader button on the FLX4.

**In version 2.9**

- Smart CFX button was mapped to toggle FX2/FX3 on decks 1/2 (on/off).
- this let you manually set FX2/FX3 and then toggle them on/off with the Smart CFX button

**In version 3.0**

- Smart CFX is un-mapped/free

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_[View the full topic](https://community.algoriddim.com/t/ddj-flx4-map-crossfader-fx-toggle-to-smart-fader-button/23996)._