The Chicago Symphony is known within the orchestra business as being one of America’s most tradition-bound orchestras, suspicious of change and slow to embrace new technologies. But now, with a new “chatty” broadcast series, an in-house record label, and an incursion into iTunes, the CSO is “acknowledging that, along with many other symphony orchestras, it must retool its services in a more contemporary way if it is to access new audiences and retain a pre-eminence in the field of radio and recordings it has enjoyed for some 50 years.”