Ключевые слова: amplifier, audio, background, blue, circle, computer, control, design, dial, digital, division, electric, electronic, element, equipment, handle, icon, illustration, interface, isolated, knob, level, loud, louder, measurement, mixer, modern, music, panel, plastic, power, push, radio, round, settings, sign, sound, speak, style, switch, symbol, technology, tuner, turn, volume, white, yellow,