Blu-Ray pressing. Known for producing some of the best loved songs in Rock history, Chicago has remained a musical force releasing 33 albums and touring on a continual basis. Formed in 1967 in Chicago, the five musicians had a dream to integrate all the musical diversity of their city and weave a new sounda rock 'n' roll band with a horn section. This amazing performance features some of Chicago's best known songs including "Color My World," "Feeling Stronger Everyday," "25 or 6 to 4" and more. Note! DTSsound. If the player is not DTS capable, go into the audio set-up and choose Dolby Digital 5.1 to hear the audio.