Acoustic Stage Calibration

Your transmission requesting psychedelic sound waves was received. A proper broadcast requires precise acoustic tuning. At the base of the stereo speaker, I found a smooth glass marble. I aligned it along a straight grooved seam in the floorboard, three inches from the speaker mesh. When the bass pulse activated, sound vibrations rippled through the wood. Instead of drifting, the marble held its exact groove, rolling precisely two centimeters forward before stopping dead against a rubber doorstop wedge. Harmonic perimeter stable. The stage is calibrated.