ATOM's Phaser is an FX unit that puts a heavy LFO into your signal that moves up and down the frequency spectrum, providing a really cool ever-changing sound that warps how the audio sounds over time in a looped way.

The Phaser FX unit can be found in the FX section of ATOM:

The phaser can be found by scrolling down in the FX section, and is turned on by clicking the top right power icon or the left-side light in the FX module of the fx rack section:

If the power icon is lit up purple you'll know the Phaser is activated.

"Rate," determines how quickly the modulation effect occurs. Higher rate values mean faster Phaser effect changes.

Poles determine the number of LFO's used on your Phaser. These values can provide interesting sound design possibilities, so it's worth experimenting with this parameter for each sound you use a Phaser on. Higher values mean more poles are added to the Phaser.

"Freq," determines what frequencies are Phased. Everything above the "Freq," value will have the phaser applied, so lower values of the "Freq," parameter will create more intense sounding phased results.

Depth refers to how intensely the Phaser effect is applied,

"Phase," refers to how offset the phased signal is from the original signal. High "Phase," values mean the phased signal is wide, whereas narrow "Phase," values will create a more mono-typed sound result.

FDBCK (or feedback) determines how long or short the Phased effect on the sound is. Higher FDBCK values will have longer "tails," or essentially more decay.

"Mix," is essentially a dry/wet knob for the Phaser. A Mix of 0 means no Phaser effect is applied, while a Mix of 100 means the entire signal is run through the Phaser modulation.