'Seek out videos of performances from different traditions that feature a soloist-leader --concertos from the Western orchestral tradition, but also (for example) rock bands, large jazz ensembles, or gospel groups. In what ways does the soloist interact with the larger ensemble? How does the leader appear to be "controlling" the musical conversation, and conversely, how is the larger ensemble providing structure and stability through musical repetition and return?' (p. 161).