Ключевые слова: audio, background, club, concept, conceptual, control, controller, cost, cutting, decrease, diminution, disc, disco, dj, economie, elasticity, enhance, equipment, fixed, hand, horizontal, improve, improvement, increase, industrial, jockey, lowering, management, manufacturing, mass, measure, mixer, mixing, music, night, nightclub, output, party, play, player, price, product, production, productivity, radio, reduce, reduction, scale, sound, volume,