Loop Stations and loop pedals—those little devices that record a musical phrase and repeat it back ad infinitum—are becoming the standard. Not only for solo musicians aiming to replicate fully formed compositions without the help of a backing band, but also for experimental artists to let tones and noises either create a mantra-like experience or challenge the patience of anyone within earshot. Jazz artist Noah Peterson appreciates both sides of that spectrum, which is why he created the NW LoopFest, an all-day celebration of the technology. ROBERT HAM