Especially useful if you feel that some of the music of decades ago is better than the great majority of today's music.
Crosby, Stills, & Nash, "Change Partners," Winterland, 10-7-73.
Van Morrison and The Band, "Caravan," Winterland, 11-25-76.
Aretha, "Bridge Over Troubled Water," Fillmore West, 3-6-71.
And Randy Newman performing his savagely satirical "Sail Away," Passaic, NJ, 2-11-78.