Garm from Ulver and Borknagar was the producer on M. If you're familiar with early Ulver at all, you'll definitely recognize his influence here:
This is the second track off of Mareridt. It's much harder than Crown, which I posted in another thread. It has a mixture of screams/growls and clean singing.
I particularly love her softer songs. This is a live version of the closer from Mareridt.