Line 6's HX One multi-effects pedal, released in December, is now compatible with the latest firmware (version 3.70) for the company's Helix/HX series. The update adds five new effects, including a new "Feedbacker" effect reproducing feedback sounds. If you have not yet updated your software, please check the following link and try the update.

How to update the firmware of HX One
Helix / HX 3.70 Firmware Update Effects Introduction Movie
Line 6 / HX One