A direct forwarding scanning system and method of operation. On the audio source comprising processing means one or more sensors, may be positioned in order to locate the position of one or more audio-presenting devices attached, close, or distant to said audio source. As a result, the peripheral device can emit a homogeneous light. The surface-treated galvanized steel sheet contains no hexavalent chromium in the film and is excellent in terms of corrosion resistance, alkali resistance, and solvent resistance.