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2001-11-28 - Representation of lyrics with compo
Consider this kind of morphing between the tune of a very popular musical,
and some composition in the style of a motet from the Middle Ages, one voice
singing the same text as the other but twice slower:
ear it
Any section of the form (lyrics ...) inside a compo script corresponds to a
lyrics section to be printed on the score. Each syllabe or word is represented
by an elementary note including some text as a string, just like for example
:
(lyrics ("I'm")("sin-")("ging")("in")("the")("rain"))
But to have the text printed under a staff, one have to associate it to the
corresponding voice, simply by setting properly the voice property at the lyrics
note level :
(lyrics :treble ("I'm")("sin-")("ging")("in")("the")("rain"))
Note that though it figures here, :treble is the default value
to the voice property and does not need to be specified.
Hence by synchronizing this expression with some other expression at the treble
voice containing notes, you will have each part of text printed under each note
at the same position. Two things are necessary for the synchronization. The
lyrics section and the notes section should be placed inside a structure containing
the :sync keyword, to indicate that both start at the same time :
(note :sync
(lyrics :tenor ("I'm")("sin-")("ging")("in")("the")("rain"))
(:tenor (:c)(:c5 :dur (+ :h :8th))(:a :8th)(:g :8th)(:f
:8th)(:d :h.)))
and each piece of text should share the same duration properties than corresponding
notes:
(note :sync
(lyrics :tenor ("I'm")("sin-" :dur (+ :h :8th))("ging"
:8th)("in" :8th)("the" :8th)("rain"
:h.))
(:tenor (:c)(:c5 :dur (+ :h :8th))(:a :8th)(:g :8th)(:f
:8th)(:d :h.)))
Of course, if you already know compo, you have guessed that, in the score example
above, the first half of the treble voice, and the bass voice can be represented
by the same object:
(note :sync
x=(:sync
(lyrics (:rest :h.)("I'm")("sin-"
:dur (+ :h :8th))("ging" :8th)("in" :8th)("the"
:8th)("rain" :h.))
((:rest :h.)(:c)(:c5 :dur (+ :h :8th))(:a :8th)(:g
:8th)(:f :8th)(:d :h.)))
(x ...)
(:bass :c3 :h x))
Hence, not only the musical notes can be shared, but equally the associated
lyrics. Now suppose that this example was to be repeated twice, with the bass
singing the second part of the text at the repetition. This is represented in
score like this:
Since the second line under the bass staff is the same text than the second
part of the treble staff, this text can also be abstracted in a variable in
order to be shared:
y=(lyrics ("Just")("sin-" :dur
(+ :h :8th))("ging" :8th)("in" :8th)("the" :8th)("rain"
:h.))
Finally, here is the whole source of the example:
(note :sync
x=(:sync
(lyrics (:rest :h.)("I'm")("sin-"
:dur (+ :h :8th))("ging" :8th)("in" :8th)("the"
:8th)("rain" :h.))
((:rest :h.)(:c)(:c5 :dur (+ :h :8th))(:a :8th)(:g
:8th)(:f :8th)(:d :h.)))
y=(lyrics ("Just")("sin-" :dur (+ :h
:8th))("ging" :8th)("in" :8th)("the" :8th)("rain"
:h.))
(x (:sync y (:c)(:f :dur (+ :h :8th))(:f :8th)(:g :8th)(:a
:8th)(:c5 :h.))
(:bass :c3 :h :sync x ((:rest :h.) (:bf y))))
Note the :bf height property to the last instance of y, which is the way to
indicate that the corresponding text is to be placed on the second line.
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