￥Excite a material with some sort of energy input (a slap, a rub, a blow) and you’ll get a noise. The resonant qualities of that material (be it wood, metal, glass, a drum, a trumpet, a buttock), and the way in which you excite it, will determine the qualities of that sound; amongst other things, its timbre, frequency, and length in time. It is this thrilling world of excitation and resonance that concerns the Rings module, originally from Mutable Instruments, and now available in Softube Modular.