I saw The Sugarcubes live at Reading back in the day.  For me, she has the same particularity as Thom Yorke from Radiohead: live there is some extra attenuation (not sure if that's the right word) in the ends of the notes that brings them fully into pitch whilst leaving all the microtones hanging.  Somehow (these are just my ears, mind you) the recordings don't manage to pick up those extra overtones.

Don't fight forces, use them R. Buckminster Fuller.