Minimal Audio’s Poly Flanger is a “musical” stereo flanger — with tuning options, scale quantization, three modes, and 1-8 voices, plus deep modulation and timbral options. “Flanger” is accurate, but almost unfair — this is a deep 8-voice comb resonator that you can set in key with your project or turn into a liquid, sound-transforming, even glitchy beast. Here’s a deep-dive guide to how to get the most out of it.