Orchestral musicians are not known for their love of corporate types, and the orchestra business itself has been in somewhat dire straits for a couple of years now. So there is unmistakable irony in what conductor Roger Nierenburg is doing under the heading The Music Paradigm. Nierenburg, music director of a small Connecticut orchestra, has been marketing the experience of leading an orchestra to big corporations as a management training seminar, with the orchestra serving as a visible (and audible) example of the necessity of competent, innovative leadership. The program is just one of many arts-based business training programs now popular with Fortune 500 types.