Function makeWhiteNoise

tests/fl/audio/test_helpers.h:323–334

Generate deterministic white noise using fl::fl_random with fixed seed

/// Generate deterministic white noise using fl::fl_random with fixed seed
inline Sample makeWhiteNoise(u32 timestamp, float amplitude = 16000.0f,
                                   int count = 512) {
    fl::fl_random rng(12345); // Deterministic seed for reproducible tests
    fl::vector<fl::i16> data;
    data.reserve(count);
    for (int i = 0; i < count; ++i) {
        // Map u16 [0, 65535] to float [-1, 1]
        float sample = (static_cast<float>(rng.random16()) / 32767.5f) - 1.0f;
        data.push_back(static_cast<fl::i16>(amplitude * sample));
    }
    return Sample(data, timestamp);
}

/// Generate a linear frequency sweep (chirp) with phase accumulation
/// Tests that a sweeping tone doesn't trigger vocal detection