Figure 2: Bars 231–239 of the fourth movement of String Quartet No. 1 (E minor) “From my life”. Above: Score for 1st and 2nd violin, viola and cello ([25] CC0 Public License https://creativecommons.org/publicdomain/zero/1.0/legalcode.en#fallback). Below: Spectrogram representation from the recording. The horizontal line from 2.5 seconds at 2,700 Hz corresponds to the “e” played by the violin. This is perceived as a shrill tone that extends over several seconds.