return {
    {
        gain = 0,
        name = 'preamp',
    },
    {
        gain = 4.021868,
        name = 'eq',
        Q = 0.5,
        frequency = 800,
    },
    {
        gain = 3.993121,
        name = 'eq',
        Q = 0.5,
        frequency = 100,
    },
}