The verification tests can examine any single component or the entire transmission path. Analyzer self-verification ensures that problems we discover are actually in the sound system. System pre-verification investigates whether equipment was installed as specified. The poster child for upstream verification is reverse polarity of left or right. Speaker position, splay angle and focus angle can be verified by the standard physical measurement tools. Noise floor measurements should be conducted with devices operating at the expected/normal voltage gains. Total Harmonic Distortion (THD) measurements are conducted by driving the DUT with a pure sine wave. Maximum input/output (I/O) capability is the dynamic range's linear upper limit. Multi-stage analog devices may have misleading silkscreen markings. Dynamic range is derived from the results of the noise and maximum input/output (I/O) capability tests. Selecting matched latency takes more DSP memory resources but saves memory resources on the human side. Axial analysis of a cardioid microphone can help optimize stage monitor placement for maximum rejection.