#pragma once struct EQBand { enum Type { Peak, LowShelf, HighShelf }; float frequency = 1000.0f; // 20 Hz - 20000 Hz float gainDb = 0.0f; // -24 dB to +24 dB float q = 1.0f; // 0.1 to 18.0 Type type = Peak; bool enabled = true; };