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HOW TO WRITE MUSIC
nate groups, he used no rests to represent the absent hand. These, appearing simultaneously with the notes, would have implied a second part. With him rests represent a living, though absent, voice; in modern usage they frequently represent, not music, but the way of playing it. See Fig. 15, the first half of which is in two parts, therefore rests represent the thirty-second note silences; and the second half of which is in one part, therefore no rests are employed though only one hand is engaged at a time. It is from a B flat Prelude in Bach's Well-tempered Clavier.
![{
\new PianoStaff
<<
\new Staff = "treble" \relative d' {
\key bes \major \stemUp
r32 d[ f d] r32 bes[ d bes]
\change Staff = "bass"
r32 f[ a f] r32 d[ f d]
s8 s32 a'[ bes c] bes
\change Staff = "treble"
s8 d32 e f!
}
\new Staff = "bass" \relative b, {
\clef bass \key bes \major \stemDown
bes8[ f'] d[ bes] g32[ d' e fis] g
s8 g32[ a bes] c
}
>>
}](http://upload.wikimedia.org/score/b/4/b4hueibv0jtyc0j3sd3eomsfgaib8kq/b4hueibv.png)
Fig. 15.
Dots.20.—Dots are used in music for Dots. three purposes: (1) as repeat marks, (2) to indicate semi-staccato, (3) to prolong a note one half. As repeat marks, they
