Edit with
Age Compensation
Boost_dB = Max(0, (Age - 20) * 0.25)
Age - 20 = 20
Multiplier = 0.25 dB per year above 20
Boost_dB = Max(0, (40 - 20) * 0.25) = 5.00 dB
High-shelf filter active above 4000 Hz