Birdsongs of the Mesozoic

Rock in Opposition (RIO) is a late‑1970s movement of progressive and experimental rock groups who united in explicit opposition to a commercial music industry that refused to recognize or support their music. Rather than a strict musical style, RIO is a banner and aesthetic: fiercely independent production; complex, often dissonant composition; chamber‑like instrumentation; left‑leaning, critical or satirical politics; and a commitment to avant‑garde techniques imported from modern classical music, free improvisation, and radical jazz. The sound typically blends rock rhythm sections with winds and strings (e.g., bassoon, clarinet, violin), intricate counterpoint, odd meters, abrupt contrasts, and through‑composed forms that defy verse–chorus conventions.

Spirituals are religious folk songs created by enslaved Africans and their descendants in the United States, blending West African musical practices with Protestant Christian hymnody. Sung primarily a cappella, they feature call-and-response, improvisation, rich timbral expression, and rhythmic drive supported by body percussion (clapping, stomping) and the ring shout. Texts draw on Biblical narratives—especially Exodus, captivity, deliverance, and redemption—while often carrying coded meanings about resistance, escape, and communal hope. Melodies frequently use pentatonic patterns, blue-leaning inflections, and flexible meter, while group performance encourages heterophony and spontaneous variation. Over time, spirituals moved from work fields and praise houses to concert stages through arranged choral traditions, profoundly shaping American music by influencing gospel, blues, jazz, soul, and the broader canon of U.S. folk and popular song.