Editing Augmented sixth chord (section)

===French sixth===
[[File:French sixth chord in Schubert's Am Feirabend.png|thumb|350px|A French sixth chord in Schubert's ''[[Die schöne Müllerin]]'', #5: "Am Feierabend"<ref>[[Allen Forte|Forte, Allen]], ''Tonal Harmony'', third edition (S.l.: Holt, Rinehart, and Wilson, 1979): p.355. {{ISBN|0-03-020756-8}}. Original with all uppercase Roman numerals.</ref> {{audio|French sixth chord in Schubert's Am Feirabend.mid|Play}}]]

The French sixth (Fr<sup>+6</sup> or Fr{{su|b=3|p=4}}) is similar to the Italian, but with an additional tone, {{music|scale|2}}. The notes of the French sixth chord are all contained within the same [[whole tone scale]], lending a sonority common to French music in the 19th century (especially associated with [[Impressionist music]]),<ref>Blatter, Alfred (2007). ''Revisiting Music Theory: a Guide to the Practice'', p.144. {{ISBN|978-0-415-97440-0}}. "One may note that the French sixth contains the elements of a whole tone scale commonly associated with French impressionistic composers."</ref> though they also make frequent appearances in Russian music.

{{block indent|<score sound="1">
    {
      \new PianoStaff <<
        \new Staff <<
            \relative c' {
                \clef treble \key c \major \time 4/4
                <d fis>1 <d g>
                }
            >>
        \new Staff <<
            \relative c' {
                \clef bass \key c \major \time 4/4
                <aes c>1_\markup { \concat { "Fr" \raise #1 \small "+6" \hspace #3.7 "V" } } 
                <g b> \bar "||"
                }
            >>
    >> }
</score>}}

This chord has the same notes as a [[dominant seventh flat five]] chord and is in fact the [[second inversion]] of II<sup>7{{Music|b}}5</sup>.