Fast, browser‑only utility for audio levels. Converts between voltage and dBu/dBV, and computes level difference between two voltages. Assumes RMS voltages.
Formulas: dBu = 20·log₁₀(V/0.775) | dBV = 20·log₁₀(V/1.0)
Voltage from dBu: V = 0.775·10^(dBu/20) | from dBV: V = 1.0·10^(dBV/20)
Formula: ΔdB = 20·log₁₀(V₂/V₁). Positive means B is higher than A.