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en: Document the unstressed RABBIT, ROSES and EXPLORE vowels.
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@@ -66,6 +66,25 @@ These are unstressed vowels that differ from the vowels in the main lexical sets
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| COMMA | `@` | ə | ə |
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| LETTER | `3` | ə | ɚ |
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Additionally, espeak-ng has the following phonemes for unstressed vowels.
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| Lexical Set | en |
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|-------------|-------|
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| EXPLORE | `e#` |
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| ROSES | `I#` |
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| RABBIT | `I2` |
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The EXPLORE lexical set is used to support unstressed KIT vowels that have split
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from the KIT vowel and merged with the DRESS vowel in some accents. This includes
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`ex-` words.
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The ROSES lexical set is used for words that are KIT in some accents and COMMA
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in others. The degree to which this occurs varies between accents and speakers.
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The RABBIT lexical set is used for unstressed KIT vowels. Some American accents
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have merged this with the COMMA lexical set, such that `rabbit` and `abbot`
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rhyme.
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## Diphthongs
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| Lexical Set | en | RP | GenAm |
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