Deerhoof Miracle-Level Joyful Noise Recordings   At a certain point in their career, many rock bands dread the audience reaction to saying “we’re going to play the new single” from onstage. It suggests that their days of vital music-making have devolved into being among the ranks of nostalgia artists. Deerhoof’s experience is quite different. They keep changing and developing as a band, and their successive releases are acclaimed and eagerly listened to by longtime fans and new listeners alike.   Several things distinguish Deerhoof’s latest Joyful Noise release, Miracle-Level, their nineteenth recording, the first released back in 1997. Improbably, this