velocity.hpp

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#pragma once
 
#include <algorithm>
#include <cmath>
 
namespace pulp::signal::drum {

struct VelocityResponse {
    float level_db = 18.0f;

    float bend_octaves = 0.0f;

    float brightness_octaves = 0.0f;

    float noise_balance = 0.0f;

    float gain(float velocity) const {
        const float v = std::clamp(velocity, 0.0f, 1.0f);
        return std::pow(10.0f, (level_db * (v - 1.0f)) / 20.0f);
    }

    float bend(float velocity) const {
        return bend_octaves * std::clamp(velocity, 0.0f, 1.0f);
    }

    float brightness_scale(float velocity) const {
        return std::exp2(brightness_octaves * std::clamp(velocity, 0.0f, 1.0f));
    }

    float noise_shift(float velocity) const {
        return noise_balance * std::clamp(velocity, 0.0f, 1.0f);
    }
};
 
}  // namespace pulp::signal::drum