Ключевые слова: 440, 440hz, accuracy, adjustment, art, background, chrome, classic, closeup, culture, diapase, diapason, equipment, falsehood, fork, frequency, guitar, harmony, hz, instrument, isolated, key, leisure, macro, metal, music, musical, note, object, old, piano, pitch, pitchfork, quality, retro, scale, sign, sound, steel, symbol, tonograph, tonometer, tool, tune, tuner, tuning, tuning fork, vibrate, vintage, white,