By Denny Dyroff, Entertainment Editor, The Times Nik Bärtsch and Ronin An often-heard phrase makes the claim that “less is more.” Sometimes, it makes sense — other times not. The phrase definitely makes sense when it’s used in reference to the music made by Nik Bärtsch. The music composed and performed by Bärtsch with his various ensembles is minimalistic — and full — at...