Introduction into C++ (Part 4)

From Stateless to Stateful: Filters & Composition In previous parts, we built an oscillator. It was "stateless"—you give it a phase, it gives you a value. It doesn’t care what happened a microsecond ago. But to make music sound "warm" or "organic," we need objects that have a memory . 1. DSP General: The Concept of State In Digital Signal Processing (DSP), a filter is stateful . To calculate the…