Volca Keys

The Korg Volca Keys has a single FX unit contained in it that makes for a far more deep and dissonant, haunting sound. That's not all it can do though, as it's great at making sparkling, uplifting choruses. Both the Volca Keys and Volca Bass have no way to upload patches, but there are lots of visual patches online that you can find to get an idea of what each setting does.