Abstract: In a sound processing method of operating audio equipment to perform sound processing relating to audio content in accordance with one embodiment, a distributor terminal communicates with the audio equipment and at least one listener terminal, the distributor terminal distributes the audio content from the distributor terminal to the at least one listener terminal, the distributor terminal specifies an operation listener terminal, from among the at least one listener terminal, that is permitted to change a sound processing parameter of the audio equipment, the operation listener terminal accepts the sound processing parameter changed by the operation listener terminal, the operation listener terminal transmits the sound processing parameter changed by the operation listener terminal to the distributor terminal, and the audio equipment performs the sound processing based on the changed sound processing parameter changed by the operation listener terminal.

Abstract: Scrap containing copper is discriminated from iron scrap after being pulverized by imaging iron scrap using a color TV camera, treating RGB signals processed by each of the points in the image as a color vector, and discriminating scrap containing copper from iron scrap when the saturation value of the color vector is larger than a predetermined value and the hue angle of the color vector lies within a predetermined range.