Cerebral Pain - the epitome of strange music with an accordion. Experimental and alternative wouldn't be accurate enough for this music. Give it a try, you won't regret.

If I had to describe how my music sounds like, it would be Dark Folk with Ambient on some tracks, or Neoclassical music. But, with Espíritos, I also began experimenting with Electronica, Doom Metal and Noise Music. Judge by yourself.