Erlkönig
... that the vocalist in "Erlkönig", published as Schubert's Op. 1, portrays four characters that differ in vocal register, rhythm, and harmony?
... that the vocalist in "<b id="mwAog"><a href="./Erlkönig_(Schubert)" id="mwAok" rel="mw:WikiLink" title="Erlkönig (Schubert)">Erlkönig</a></b>", published as <a href="./Franz_Schubert" id="mwAoo" rel="mw:WikiLink" title="Franz Schubert">Schubert</a>'s <a href="./Opus_number" id="mwAos" rel="mw:WikiLink" title="Opus number">Op.</a><span id="mwAow" typeof="mw:Entity"> </span>1, portrays four characters that differ in vocal register, rhythm, and harmony?