Demonstration of how to encode turn ornaments.
The example is from Beethoven's piano sonata no. 1 in F minor,
op. 2, no. 1, mvmt. 2: Adagio. The first turn is centered
above the note it applies to. The second turn in the next
measure is centered *between* the note it is applied to and
the following note in the layer. Both of the example turns
have accidentals underneath them; the first has a natural sign
which means play the lower diatonic note as a natural (B-natural).
The second has a sharp sign underneath it which means play
a sharped lower diatonic tone (F-sharp). Turns can also have
accidentals placed above them which indicate the chromatic
alteration of the upper diatonic tone.