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161 lines
4.1 KiB
Markdown
161 lines
4.1 KiB
Markdown
# Intonation
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- [Clauses](#clauses)
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- [Tune Definitions](#tune-definitions)
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- [tune](#tune)
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- [endtune](#endtune)
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- [prehead](#prehead)
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- [headenv](#headenv)
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- [head](#head)
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- [headextend](#headextend)
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- [nucleus](#nucleus)
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- [onset](#onset)
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- [headlast](#headlast)
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----------
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In eSpeak NG's standard intonation model, a "tune" is applied to each
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clause depending on its punctuation. Other intonation models may be used
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for some languages, such as tone languages.
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Named tunes are defined in the text file `phsource/intonation`. This file
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must be compiled for use by eSpeak NG by using:
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espeak-ng --compile-intonations
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## Clauses
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The tunes which are used for a language can be specified by using a
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`tunes` statement in a voice file in `espeak-data/voices`. e.g.:
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tunes s1 c1 q1 e1
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It's parameters are four tune names which are used for clauses which end
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in:
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1. Full-stop.
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2. Comma.
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3. Question mark.
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4. Exclamation mark.
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A clause consists of the following parts:
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Pre-head
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These are any unstressed syllables before the first stressed syllable.
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Head
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This is the part from the first stressed syllable up to the last syllable
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before the nucleus.
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Nucleus
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This is stressed syllable which is the focus of the clause. eSpeak chooses
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the last stressed syllable of the clause.
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Tail
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These are the syllables after the nucleus.
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## Tune Definitions
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Here is an example tune definition from the file `phsource/intonation`:
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tune s1
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prehead 46 57
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headenv fall 16
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head 4 80 55 -8 -5
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headextend 0 63 38 13 0
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nucleus fall 70 18 24 12
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nucleus0 fall 64 8
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endtune
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### tune
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tune <tune name>
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Starts the definition of a tune. The `tune name` can be used in a `tunes`
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statements in voice files.
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### endtune
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endtune <tune name>
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Ends the definition of a tune.
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### prehead
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prehead <start pitch> <end pitch>
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Gives the pitch path for any series of unstressed syllables before the first
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stressed syllable.
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### headenv
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headenv <envelope> <height>
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Gives the pitch envelope which is used for stressed syllables in the head
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(before the nucleus), including `onset` and `headlast` syllables if these
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are specified.
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`height` gives a pitch range for the envelope.
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### head
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head <steps> <start pitch> <end pitch> <unstressed start> <unstressed end>
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`start pitch` give a pitch path for the stressed syllables of the head.
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steps` is the maximum number of stressed syllables for which this applies. If
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there are additional stressed syllables, then the `headextend` statement is used
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for them.
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`unstressed start` give a pitch path for unstressed syllables between two stressed
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syllables. Their values are relative to the pitch of the previous stressed syllable.
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Values are usually negative, meaning that the unstressed syllables have lower pitch
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than the previous stressed syllable.
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### headextend
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headextend <percentage list>
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If the head contains more stressed syllables than is specified by `steps` is used.
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Itmcontains up to 8 numbers which are used repeatedly for the additional stressed
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syllables. A value of 0 corresponds to the lower the `start pitch` values of the
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`head` statement. 100 corresponds to the higher value.
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Negative values and values greater than 100 are allowed.
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### nucleus
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nucleus <envelope> <top pitch> <bottom pitch> <tail start> <tail end>
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This gives the pitch envelope and pitch range of the last stressed syllable of
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the clause. `tail start` and `tail end` give a pitch path for the unstressed
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syllables which are after the last stressed syllable.
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### nucleus0
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nucleus0 <envelope> <top pitch> <bottom pitch>
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This is used instead of `nucleus` if there are no unstressed syllables after
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the last stressed syllable. In this case, the pitch changes of the nucleus and
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the tail and both included in the nucleus.
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### onset
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onset <pitch> <unstressed start> <unstressed end>
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This specifies the pitch for the first stressed syllable of the head. If the
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`onset` statement is present, then the `head` statement used for the stressed
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syllables after the first.
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### headlast
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headlast <pitch> <unstressed start> <unstressed end>
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This specifies the pitch for the last stressed syllable of the head (i.e. the
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stressed syllable before the nucleus).
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