The things you can do with computer animation these days are just more and more amazing. In “Sing,” a funny animal jukebox musical cartoon written and directed by Garth Jennings (“Son of Rambow”), there is a scene in which two postpunk porcupines, one of whom has been selected to compete in a vocal competition, argue at home about the state of their relationship, and their musical direction. During their quarrel I thought, with absolute earnestness, “Wow, these porcupines have an unusually spacious apartment.”

The funny animal jukebox musical cartoon has a long and honorable history, dating back to, for example, the 1936 animated short “I Love to Singa.” That still-beloved cartoon, directed by Tex Avery, features a jazz-loving young hooter who, much to the consternation of his classically trained family, bills himself as Owl Jolson on a radio amateur hour hosted by Jack Bunny. “Sing” is essentially that very short, writ large.