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docs: Document the lexical set transcriptions used by the en language files.
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@@ -15,60 +15,66 @@ Sets<sup>\[<a href="#ref1">1</a>\]</sup>. These were created by Wells in 1982
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by comparing the Received Pronunciation British (RP) and General American
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(GenAm) accents in use at that time.
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The `en` transcriptions listed below are the phonemes used by eSpeak NG to
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transcribe the different lexical sets.
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## Short Vowels
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| Lexical Set | RP | GenAm |
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|-------------|-------|-------|
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| KIT | ɪ | ɪ |
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| DRESS | e | ɛ |
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| TRAP | æ | æ |
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| LOT | ɒ | ɑ |
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| STRUT | ʌ | ʌ |
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| FOOT | ʊ | ʊ |
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| Lexical Set | en | RP | GenAm |
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|-------------|-------|-------|-------|
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| KIT | `I` | ɪ | ɪ |
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| DRESS | `E` | e | ɛ |
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| TRAP | `a` | æ | æ |
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| LOT | `0` | ɒ | ɑ |
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| STRUT | `V` | ʌ | ʌ |
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| FOOT | `U` | ʊ | ʊ |
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## Long Vowels
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| Lexical Set | RP | GenAm |
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|-------------|-------|-------|
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| FLEECE | iː | i |
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| PALM | ɑː | ɑ |
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| THOUGHT | ɔː | ɔ |
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| GOOSE | uː | u |
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| Lexical Set | en | RP | GenAm |
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|-------------|-------|-------|-------|
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| FLEECE | `i:` | iː | i |
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| PALM | `A:` | ɑː | ɑ |
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| THOUGHT | `O:` | ɔː | ɔ |
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| GOOSE | `u:` | uː | u |
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## Rhotic Vowels
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These are vowels that are followed by an `r` that is not part of the next syllable
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when considering the root form of the word containing that vowel.
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| Lexical Set | RP | GenAm |
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|-------------|-------|-------|
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| NURSE | ɜː | ɝ |
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| START | ɑː | ɑɹ |
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| NORTH | ɔː | ɔɹ |
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| FORCE | ɔː | oɹ |
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| CURE | ʊə̯ | ʊɹ |
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| NEAR | ɪə̯ | ɪɹ |
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| SQUARE | eə̯ | ɛɹ |
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| Lexical Set | en | RP | GenAm |
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|-------------|-------|-------|-------|
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| NURSE | `3:` | ɜː | ɝ |
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| START | `A@` | ɑː | ɑɹ |
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| NORTH | `O@` | ɔː | ɔɹ |
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| FORCE | `o@` | ɔː | oɹ |
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| CURE | `U@` | ʊə̯ | ʊɹ |
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| NEAR | `i@3` | ɪə̯ | ɪɹ |
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| SQUARE | `e@` | eə̯ | ɛɹ |
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__NOTE:__ `/i@3/` is used for the NEAR lexical set to differentiate it from
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`/i@/` used in words like `million`.
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## Reduced Vowels
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These are unstressed vowels that differ from the vowels in the main lexical sets.
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| Lexical Set | RP | GenAm |
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|-------------|-------|-------|
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| HAPPY | ɪ | i |
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| COMMA | ə | ə |
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| LETTER | ə | ɚ |
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| Lexical Set | en | RP | GenAm |
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|-------------|-------|-------|-------|
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| HAPPY | `i` | ɪ | i |
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| COMMA | `@` | ə | ə |
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| LETTER | `3` | ə | ɚ |
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## Diphthongs
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| Lexical Set | RP | GenAm |
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|-------------|-------|-------|
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| FACE | eɪ̯ | eɪ̯ |
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| PRICE | aɪ̯ | aɪ̯ |
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| CHOICE | ɔɪ̯ | ɔɪ̯ |
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| GOAT | əʊ̯ | oʊ̯ |
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| MOUTH | aʊ̯ | aʊ̯ |
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| Lexical Set | en | RP | GenAm |
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|-------------|-------|-------|-------|
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| FACE | `eI` | eɪ̯ | eɪ̯ |
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| PRICE | `aI` | aɪ̯ | aɪ̯ |
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| CHOICE | `OI` | ɔɪ̯ | ɔɪ̯ |
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| GOAT | `oU` | əʊ̯ | oʊ̯ |
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| MOUTH | `aU` | aʊ̯ | aʊ̯ |
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## Split Vowels
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@@ -76,10 +82,15 @@ These are lexical sets defined by John Wells that are merged with other lexical
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sets in both RP and GenAm, so have split from one of those lexical sets and
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merged with the other.
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| Lexical Set | RP | GenAm |
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|-------------|-------|-------|
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| BATH | ɑː | æ |
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| CLOTH | ɒ | ɔ |
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| Lexical Set | en | RP | GenAm |
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|-------------|-------|-------|-------|
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| BATH | `aa` | ɑː | æ |
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| CLOTH | `0` | ɒ | ɔ |
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__NOTE:__ eSpeak NG does not have a distinct transcription for the CLOTH lexical
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set. As such, it can only represent American English accents with the COT-CAUGHT
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merger where COT is the American PALM-LOT merger and CAUGHT is the American
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THOUGHT-CLOTH merger.
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## References
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+26
-26
@@ -97,7 +97,7 @@ endphoneme
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// VOWELS
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//*******************************************************************
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phoneme @ // Schwa
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phoneme @
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vwl starttype #@ endtype #@
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unstressed
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length 140
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@@ -109,7 +109,7 @@ phoneme @ // Schwa
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endphoneme
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phoneme 3 // Schwa, used for rhotic schwa in American, e.g. bett**er**
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phoneme 3
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CALL @
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ipa ə
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endphoneme
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@@ -178,7 +178,7 @@ phoneme a# // **a**bout. This may be \[@\] or may be a more open schwa.
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endphoneme
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phoneme aa // 'b**a**th' etc. This is \[a\] in some accents, \[A:\] in others.
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phoneme aa
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vwl starttype #a endtype #a
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ipa a
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length 200
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@@ -192,7 +192,7 @@ phoneme aa // 'b**a**th' etc. This is \[a\] in some accents, \[A:\] in other
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endphoneme
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phoneme E // dr**e**ss
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phoneme E
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vwl starttype #e endtype #e
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length 140
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IF nextPhW(n) THEN
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@@ -223,7 +223,7 @@ endphoneme
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phoneme I // k**i**t
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phoneme I
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vwl starttype #i endtype #i
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length 130
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IfNextVowelAppend(;)
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@@ -263,7 +263,7 @@ phoneme I# // used for [I] which may be [@] in some accents
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endphoneme
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phoneme i // happ**y**. optional variant of [I] for end of words
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phoneme i
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vwl starttype #i endtype #i
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unstressed
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ipa i
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@@ -278,7 +278,7 @@ phoneme i // happ**y**. optional variant of [I] for end of words
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endphoneme
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phoneme 0 // l**o**t
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phoneme 0
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vwl starttype #o endtype #o
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length 140
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ChangeIfDiminished(@)
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@@ -304,7 +304,7 @@ phoneme 02 // becomes V in en-us
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endphoneme
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phoneme V // str**u**t
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phoneme V
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vwl starttype #a endtype #@
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length 140
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@@ -313,7 +313,7 @@ phoneme V // str**u**t
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endphoneme
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phoneme U // f**oo**t
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phoneme U
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vwl starttype #o endtype #o
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length 150
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@@ -327,7 +327,7 @@ endphoneme
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phoneme A: // p**al**m
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phoneme A:
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vwl starttype #a endtype #a
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length 230
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IfNextVowelAppend(r-)
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@@ -335,7 +335,7 @@ phoneme A: // p**al**m
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endphoneme
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phoneme A@ // st**ar**t. Used for [A:] when followed by 'r'.
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phoneme A@
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vwl starttype #a endtype #a
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ipa ɑː
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length 230
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@@ -352,7 +352,7 @@ endphoneme
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phoneme 3: // n**ur**se
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phoneme 3:
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vwl starttype #@ endtype #@
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length 210
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IfNextVowelAppend(r-)
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@@ -361,7 +361,7 @@ phoneme 3: // n**ur**se
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endphoneme
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phoneme i: // fl**ee**ce
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phoneme i:
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vwl starttype #i endtype #i
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length 175
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IfNextVowelAppend(;)
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@@ -372,7 +372,7 @@ phoneme i: // fl**ee**ce
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endphoneme
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phoneme O: // th**ou**ght
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phoneme O:
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vwl starttype #o endtype #o
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length 230
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ChangeIfDiminished(@)
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@@ -388,7 +388,7 @@ phoneme O
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endphoneme
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phoneme O@ // n**or**th
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phoneme O@
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vwl starttype #o endtype #o
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ipa ɔː
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length 240
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@@ -397,7 +397,7 @@ phoneme O@ // n**or**th
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endphoneme
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phoneme o@ // f**or**ce
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phoneme o@
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vwl starttype #o endtype #o
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ipa ɔː
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length 250
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@@ -411,7 +411,7 @@ phoneme o@ // f**or**ce
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endphoneme
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phoneme u: // g**oo**se
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phoneme u:
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vwl starttype #u endtype #u
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length 210
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IF nextPh(l/2) THEN
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@@ -424,14 +424,14 @@ phoneme u: // g**oo**se
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endphoneme
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phoneme aU // m**ou**th
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phoneme aU
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vwl starttype #a endtype #u
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length 230
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FMT(vdiph/au)
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endphoneme
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phoneme oU // g**oa**t
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phoneme oU
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vwl starttype #@ endtype #u
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ipa əʊ
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length 220
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@@ -453,7 +453,7 @@ phoneme oU#
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endphoneme
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phoneme aI // pr**i**ce
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phoneme aI
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vwl starttype #a endtype #i
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length 240
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IF nextPh(#a) THEN
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@@ -463,21 +463,21 @@ phoneme aI // pr**i**ce
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endphoneme
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phoneme eI // f**a**ce
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phoneme eI
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vwl starttype #e endtype #i
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length 210
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FMT(vdiph/eei)
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endphoneme
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phoneme OI // ch**oi**ce
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phoneme OI
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vwl starttype #o endtype #i
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length 230
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FMT(vdiph/ooi)
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endphoneme
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phoneme e@ // squ**are**
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phoneme e@
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vwl starttype #e endtype #@
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length 230
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IfNextVowelAppend(r-)
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@@ -485,7 +485,7 @@ phoneme e@ // squ**are**
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endphoneme
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phoneme i@ // mill**io**n
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phoneme i@
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vwl starttype #i endtype #@
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length 250
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IfNextVowelAppend(r-)
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@@ -493,7 +493,7 @@ phoneme i@ // mill**io**n
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endphoneme
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phoneme i@3 // n**ear**
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phoneme i@3
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vwl starttype #i endtype #@
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length 250
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@@ -506,7 +506,7 @@ phoneme i@3 // n**ear**
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endphoneme
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phoneme U@ // c**ure**
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phoneme U@
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vwl starttype #u endtype #@
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length 200
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IfNextVowelAppend(r-)
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