When using Flex, the controller maps faders and knobs to commonly-used parameters. The next/previous track buttons are mapped to next/previous preset options.

The 8 faders are mapped to the 8 macro sliders.

The mapping of the knobs is controlled using the buttons on the drum pads.

1. [Red]: Filter AHDSR. The first five knobs are mapped to attack, hold, deay, sustain, and release settings for the filter.
2. [Orange]: Volume AHDSR.The first five knobs are mapped to attack, hold, deay, sustain, and release settings for the volume.
3. [Pink]: Main Filter. The first two knobs are mapped to the master filter cutoff and resonance, respectively.
4. [Purple]: Delay. The first five knobs are mapped to the delay's mix level, time, feedback, colour, and mod.
5. [Blue]: Reverb. The first six knobs are mapped to the reverb's mix level, time, feedback, colour, mod, and speed.