New Orleans brings to mind sounds of big band and certain other persuasions of jazz, but oddly produced rock — not so much. Mute Math’s songs sound like their ingredients are pretty conventional, but then throw unusual instrumentation and production in a blender. Armistice (out August 18) is a rock album, but the rhythm section sets the sound apart from other bands in a similar vein. Produced by Dennis Herring, Armistice has only been heard in bits so far, but those little pieces hint at something great. There’s also rumor of a documentary about how the album was made that’s in the works.