12. Notes

12.1. Making notes from a string

You can make notes from string:

abjad> note = Note("c'4")

abjad> show(note)

12.2. Making notes from chromatic pitch number and duration

You can also make notes from chromatic pitch number and duration:

abjad> note = Note(0, Duration(1, 4))

abjad> show(note)

(You even use Note("c'4") to create notes with numbers alone.)

12.3. Getting the written pitch of notes

You can get the written pitch of notes:

abjad> note.written_pitch
NamedChromaticPitch("c'")

12.4. Changing the written pitch of notes

And you can change the written pitch of notes:

abjad> note.written_pitch = "cs'"

(You can use note.written_pitch = 1 to change pitch with numbers, too.)

12.5. Getting the duration attributes of notes

Get the written duration of notes like this:

abjad> note.written_duration
Duration(1, 4)

Which is usually the same as preprolated duration:

abjad> note.preprolated_duration
Duration(1, 4)

And prolated duration:

abjad> note.prolated_duration
Duration(1, 4)

Except for notes inside a tuplet:

abjad> tuplet = Tuplet(Fraction(2, 3), [Note("c'4"), Note("d'4"), Note("e'4")])

abjad> show(tuplet)

abjad> note = tuplet[0]

Tupletted notes carry written duration:

abjad> note.written_duration
Duration(1, 4)

Prolation:

abjad> note.prolation
Fraction(2, 3)

And prolated duration that is the product of the two:

abjad> note.prolated_duration
Duration(1, 6)

12.6. Changing the written duration of notes

You can change the written duration of notes:

abjad> tuplet[0].written_duration = Duration(1, 8)
abjad> tuplet[1].written_duration = Duration(1, 8)
abjad> tuplet[2].written_duration = Duration(1, 8)

abjad> show(tuplet)

Other duration attributes are read-only.

12.7. Overriding notes

The notes below are black with fixed thickness and predetermined spacing:

abjad> staff = Staff("c'4 d'4 e'4 f'4 g'4 a'4 g'2")
abjad> slur_1 = spannertools.SlurSpanner(staff[:2])
abjad> slur_2 = spannertools.SlurSpanner(staff[2:4])
abjad> slur_3 = spannertools.SlurSpanner(staff[4:6])

abjad> f(staff)
\new Staff {
        c'4 (
        d'4 )
        e'4 (
        f'4 )
        g'4 (
        a'4 )
        g'2
}

abjad> show(staff)

But you can override LilyPond grobs to change the look of notes, rests and chords:

abjad> staff[-1].override.note_head.color = 'red'
abjad> staff[-1].override.stem.color = 'red'

abjad> f(staff)
\new Staff {
        c'4 (
        d'4 )
        e'4 (
        f'4 )
        g'4 (
        a'4 )
        \once \override NoteHead #'color = #red
        \once \override Stem #'color = #red
        g'2
}

abjad> show(staff)

12.8. Removing note overrides

Delete grob overrides you no longer want:

abjad> del(staff[-1].override.stem)

abjad> f(staff)
\new Staff {
        c'4 (
        d'4 )
        e'4 (
        f'4 )
        g'4 (
        a'4 )
        \once \override NoteHead #'color = #red
        g'2
}

abjad> show(staff)