Quadratic Difference Tones

Famous quotes containing the words difference and/or tones:

    ... if the Settlement seeks its expression through social activity, it must learn the difference between mere social unrest and spiritual impulse.
    Jane Addams (1860–1935)

    There sighs, lamentations and loud wailings resounded through the starless air, so that at first it made me weep; strange tongues, horrible language, words of pain, tones of anger, voices loud and hoarse, and with these the sound of hands, made a tumult which is whirling through that air forever dark, as sand eddies in a whirlwind.
    Dante Alighieri (1265–1321)