The Passacaglia is a stately triple-time dance of Renaissance Spain. Later re-workings of the three-step open and close this weekend’s Detroit Symphony Orchestra program – first in music by Anton Webern, then in Johannes Brahms’ Symphony No. 4. Simone Young leads the DSO in the concert of Viennese composers, and talks with WRCJ’s Peter Whorf about Brahms’ take on the Passacaglia…