Jader Bignamini was named this week as the new Music Director of the Detroit Symphony Orchestra starting in the 2020-21 season. Maestro Bignamini first led the DSO in 2018 in their electrifying concert stage production of Giacomo Puccini’s Turandot. This past fall, Bignamini performed again with the DSO in a program highlighted by Gustav Mahler’s Symphony No.4. WRCJ’s Peter Whorf speaks with the DSO’s 18th music director…