Perhaps the most well-known production alias of Luke Slater, Planetary Assault Systems is one musical act that lives up to its name: throwing down a gauntlet of massive electrified sound like something you’d expect from an invasion force (or perhaps liberation force?) of alien spacecraft, P.A.S. has spent almost a quarter century as a standard-bearer for the most uncompromising factions of the techno movement. Interpreting “funk” as something chromed and robotic, while also making undeniably sweaty and sensuous music that could be labeled as “industrial,” P.A.S. has showed a disregard for accepted musical templates and has become deeply inspirational for other adventurous spirits. The sky’s the limit for Planetary Assault Systems’ experimental tendencies: the newest opus Arc Angel (released in September of 2016) stretches out stylistically even more than its predecessors, renewing an emphasis on melody over nearly 100 minutes of new material.