XAOC Devices Hel

This module has made the largest difference to my eurorack setup for the smallest size and lowest price. Notwithstanding that you do need an XAOC Odessa to use it in the first place... Odessa already sounded great but now I can play glorious synth pads so I definitely recommend this as an add-on.
If I'm using Hel then I generally have Odessa in 3 voice mode with a Keystep and Befaco Midi Thing to get the 3 CVs. Controlling 5 is possible too but I'd need a larger midi interface.

It simply allows you CV pitch control over all 5 voices of the Odessa module. Wouldn't have bought the Odessa without the Hel. To me is fundamental to unleash the full potential of the oscillator module. Recommend!
Obviously it doesn't make sounds of its own, gave it 5 stars as it made no sense to lower the rating for that reason: it's an expansion module!