Swirly & Sweepy, not too creepy.
Svep is a stereo modulation filter effect suitable for any sound. All parameters are easily editable in one screen and the clean and responsive user interface encourages creativity. Tweak it to produce anything from old-school phasers to subtle choruses.
Set the level of feedback from the output to the input, thereby creating a feedback comb filter
2. Frequency & Depth
Drag upwards to increase the modulation depth, drag sideways to set the modulation frequency.
3. Stereo link
If you want the lefty and the righty to play in sync, make sure this is on.