Ключевые слова: analog, arrow, audio, channel, circuit, control, decibel, device, dials, direct, electric, electrical, electricity, electronic, equipment, gauge, gear, indicator, interface, level, measure, meter, metr, mixer, monitor, music, peak, pointer, radio, record, recorder, resistance, retro, scale, scientific, signal, sound, stereo, studio, tape, technologic, tool, value, voltmeter, volume,