Mordent

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[edit] In Music

In music, a mordent is an ornament that means that the note is to be played in rapid alternation with the note below. Like trills, they can be chromatically modified by a small flat, sharp or natural accidental. They occur most frequently in piano music (such as the repertoire of Chopin) but occasionally turn up in orchestral scores.

The mordent is thought of as a rapid single alternation between an indicated note, the note above (called the upper mordent, inverted mordent, or pralltriller) or below (called the lower mordent or mordent) the indicated note, and the indicated note again.

The upper mordent is indicated by a short squiggle; the lower mordent is the same with a short vertical line through it:

As with the trill, the exact speed with which the mordent is performed will vary according to the tempo of the piece, but at moderate tempi the above might be executed as follows:

Listen to a passage firstly played with lower mordents, then played without. (Ogg)

It should be noted that in the Baroque period, a Mordant (the German equivalent of mordent) was what later came to be called an inverted mordent and what is now often called a lower mordent. In the 19th century, however, the name mordent was generally applied to what is now called the upper mordent. This confusion over the meaning of the unadorned word mordent is what has led to the modern terms upper and lower mordent being used rather than mordent and inverted mordent.

Although mordents are now thought of as just a single alternation between notes, in the Baroque period it appears that a Mordant may sometimes have been executed with more than one alternation between the indicated note and the note below, making it a sort of inverted trill.

Also, mordents of all sorts might typically, in some periods, begin with an extra unessential note (the lesser, added note), rather than with the principal note as shown in the examples here. The same applies to trills, which in Baroque and Classical times would standardly begin with the added, upper note. Practice, notation, and nomenclature vary widely for all of these ornaments, and this article as a whole addresses an approximate nineteenth-century standard.

A lower unessential note may or may not be chromatically raised (that is, with a natural, a sharp, or even a double sharp) to make it just one semitone lower than the principal note.

[edit] In Linguistics

In linguistics, a mordent is an elongated bar above a letter, used e.g. in transliterating Japanese in the Hepburn system.

Musical notation	edit
Staff : Bar line | Clef | Key signature | Leger line | Time signature | Rehearsal letter
Notes : Accidental | Dotted note | Note value | Rest | Slur | Tie
Expression marks: Articulation | Dynamics | Octaves | Ornaments | Tempo