A level meter rendered as a genuinely row-multiplexed LED dot-matrix panel: five rows addressed round-robin off a real 240Hz-per-row clock, and each LED's brightness is a literal 8-step PWM duty-cycle quantization rather than a smooth analog fill. The row-address concept shows as a calm, low-amplitude brightness gradient a couple of rows wide, drifting slowly down the panel and back: legible on a second look, never a strobe.