It’s an oscillator, a step sequencer, a modulation and envelope source, a quantizer (with custom tunings) — even a scope, thanks to its interactive, animated visual interface. Thorn Audio’s new Eurorack module can make anything from elegant, precise curves. It’s more than just another do-everything module. Now you’re playing with Splines. I’ve been reviewing Splines since early beta testing, and it’s instantly an indispensable tool — a wonderful combination of the feeling of precise lab equipment, art class, and bending musical expression in time. It might be the first Eurorack module with a display that feels tactile in use, thanks to those satisfying controls and the ability to twirl your way through every parameter and node. (Like you can actually find some muscle memory, despite the display — think video game.) And yeah, I was one of the people cheering on the inclusion of different tunings for quantization. It’s just so many things you might need, from a signal visualizer to envelope maker, all in one.…