In the foreword to David Dodd’s The Complete Annotated Grateful Dead Lyrics, Robert Hunter, the band’s “lyricist in residence,” wrote that the song “Uncle John’s Band” represented “the first lyric I wrote with the aid of that newfangled gadget, the cassette tape recorder. I taped the band playing the arrangement and was able to score lyrics at leisure rather than scratch away hurriedly at rehearsals, waiting for particular sections to come around again.”
What Hunter was describing, of course, was an improvement in productivity resulting from the application of new technology. Productivity is usually measured in terms of the labor cost per unit of production, and in most cases improvement is achieved by using new technology to reduce head count. For instance, a steel mill that once employed 10,000 workers produces the same tonnage with only a thousand employees, bank tellers are replaced by ATMs and elevator operators become a thing of the past. But in Hunter’s application of new technology, no one’s position was eliminated. It’s an example of what has been called “the quartet effect” at work.