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Portuguese CV dictionary v2.0.0#

  • Maintainer: Vox Communis

  • Language: Portuguese

  • Dialect: N/A

  • Phone set: Epitran

  • Number of words: 29,965

  • Phones: a b d e f i j j̃ k kʷ l m n o p s t u v w w̃ z õ ĩ ũ ɐ ɐ̃ ɔ ɛ ɛ̃ ɡ ɡʷ ɡ̃ ɾ ʁ ʃ ʒ ẽ

  • License: CC-0

  • Compatible MFA version: v2.0.0

  • Citation:

@misc{Ahn_Chodroff_2022,
	author={Ahn, Emily and Chodroff, Eleanor},
	title={VoxCommunis Corpus},
	address={\url{https://osf.io/t957v}},
	publisher={OSF},
	year={2022},
	month={Jan}
}

Acoustic models

Installation#

Install from the MFA command line:

mfa model download dictionary portuguese_cv

Or download from the release page.

Intended use#

This dictionary is intended for forced alignment of Portuguese transcripts.

This dictionary uses the Epitran phone set for Portuguese, and was used in training the Portuguese Epitran acoustic model. Pronunciations can be added on top of the dictionary, as long as no additional phones are introduced.

Performance Factors#

When trying to get better alignment accuracy, adding pronunciations is generally helpful, especially for different styles and dialects. The most impactful improvements will generally be seen when adding reduced variants that involve deleting segments/syllables common in spontaneous speech. Alignment must include all phones specified in the pronunciation of a word, and each phone has a minimum duration (by default 10ms). If a speaker pronounces a multisyllabic word with just a single syllable, it can be hard for MFA to fit all the segments in, so it will lead to alignment errors on adjacent words as well.

Ethical considerations#

Deploying any Speech-to-Text model into any production setting has ethical implications. You should consider these implications before use.

Demographic Bias#

You should assume every machine learning model has demographic bias unless proven otherwise. For pronunciation dictionaries, it is often the case that transcription accuracy and lexicon coverage for the prestige variety modeled in this dictionary compared to other variants. If you are using this dictionary in production, you should acknowledge this as a potential issue.

IPA Charts#

Consonants#

Obstruent symbols to the left of are unvoiced and those to the right are voiced.

Manner

Labial

Labiodental

Alveolar

Alveopalatal

Palatal

Velar

Uvular

Nasal
Occurrences:
7,068
Examples:
* mudar:
[m u d ɐ ɾ]
* "um,":
[u m]
* mofo?:
[m o f o]
* molly:
[m o l l j]
Occurrences:
12,886
Examples:
* dente:
[d ɛ n t ɛ]
* neve?:
[n ɛ v ɛ]
* nara:
[n ɐ ɾ ɐ]
* nevou:
[n ɛ v o w u]

Stop
Occurrences:
5,686
Examples:
* opôs:
[o p o ʃ]
* punir:
[p u n i ɾ]
* pôde.:
[p o d ɛ]
* pele.:
[p ɛ l ɛ]
Occurrences:
2,949
Examples:
* baixe:
[b a j k s ɛ]
* baixa:
[b a j k s ɐ]
* belas:
[b ɛ l ɐ ʃ]
* bolas:
[b o l ɐ ʃ]
Occurrences:
11,720
Examples:
* dente:
[d ɛ n t ɛ]
* detém:
[d ɛ t ẽ]
* ontem:
[o n t ɛ̃]
* frite:
[f ɾ i t ɛ]
Occurrences:
9,448
Examples:
* dente:
[d ɛ n t ɛ]
* mudar:
[m u d ɐ ɾ]
* detém:
[d ɛ t ẽ]
* sadio:
[s ɐ d i o]
Occurrences:
8,148
Examples:
* colei:
[k o l ɛ j]
* cola:
[k o l ɐ]
* criou:
[k ɾ i o w u]
* baixe:
[b a j k s ɛ]
Occurrences:
2,396
Examples:
* signo:
[s i ɡ n o]
* jung:
[ʒ u n ɡ]
* agong:
[ɐ ɡ o n ɡ]
* rugas:
[ʁ u ɡ ɐ ʃ]

Sibilant
Occurrences:
9,711
Examples:
* sadio:
[s ɐ d i o]
* sai?:
[s a j]
* baixe:
[b a j k s ɛ]
* signo:
[s i ɡ n o]
Occurrences:
4,100
Examples:
* vezes:
[v ɛ z ɛ ʃ]
* casa?:
[k ɐ z ɐ]
* acena:
[ɐ z ɛ n ɐ]
* souza:
[s o w u z ɐ]
Occurrences:
7,954
Examples:
* vezes:
[v ɛ z ɛ ʃ]
* belas:
[b ɛ l ɐ ʃ]
* retos:
[ʁ ɛ t o ʃ]
* rugas:
[ʁ u ɡ ɐ ʃ]
Occurrences:
1,887
Examples:
* janta:
[ʒ ɐ n t ɐ]
* jung:
[ʒ u n ɡ]
* jardi:
[ʒ ɐ ɾ d i]
* raiz:
[ʁ a j ʒ]

Fricative
Occurrences:
2,706
Examples:
* fim:
[f ĩ]
* mofo?:
[m o f o]
* frite:
[f ɾ i t ɛ]
* forme:
[f o ɾ m ɛ]
Occurrences:
3,768
Examples:
* livro:
[l i v ʁ o]
* neve?:
[n ɛ v ɛ]
* vir.:
[v i ɾ]
* nevou:
[n ɛ v o w u]
Occurrences:
3,601
Examples:
* livro:
[l i v ʁ o]
* rolar:
[ʁ o l ɐ ɾ]
* radar:
[ʁ ɐ d ɐ ɾ]
* retos:
[ʁ ɛ t o ʃ]

Approximant
Occurrences:
2,254
Examples:
* nevou:
[n ɛ v o w u]
* criou:
[k ɾ i o w u]
* aulas:
[a w l ɐ ʃ]
* souza:
[s o w u z ɐ]
Occurrences:
1,163
Examples:
* lobão:
[l o b ɐ̃ w̃]
* opção:
[o p s ɐ̃ w̃]
* união:
[u n i ɐ̃ w̃]
* leão:
[l ɛ ɐ̃ w̃]
Occurrences:
2,634
Examples:
* colei:
[k o l ɛ j]
* holly:
[o l l j]
* sai?:
[s a j]
* molly:
[m o l l j]
Occurrences:
46
Examples:
* mães!:
[m ɐ̃ j̃ s]
* cães.:
[k ɐ̃ j̃ s]
* twain:
[t w a j̃]
* mãe.:
[m ɐ̃ j̃]

Tap
Occurrences:
13,572
Examples:
* rolar:
[ʁ o l ɐ ɾ]
* nara:
[n ɐ ɾ ɐ]
* vir.:
[v i ɾ]
* mudar:
[m u d ɐ ɾ]

Lateral
Occurrences:
8,352
Examples:
* livro:
[l i v ʁ o]
* rolar:
[ʁ o l ɐ ɾ]
* colei:
[k o l ɛ j]
* holly:
[o l l j]

Vowels#

Vowel symbols to the left of are unrounded and those to the right are rounded.

Oral Vowels#

Front

Near-Front

Central

Near-Back

Back

Close
Occurrences:
16,342
Examples:
* livro:
[l i v ʁ o]
* vir.:
[v i ɾ]
* sadio:
[s ɐ d i o]
* envie:
[ɛ n v i ɛ]
Occurrences:
5,071
Examples:
* mudar:
[m u d ɐ ɾ]
* nevou:
[n ɛ v o w u]
* criou:
[k ɾ i o w u]
* "um,":
[u m]

Close-Mid
Occurrences:
1,098
Examples:
* roeu:
[ʁ o w e w]
* cineu:
[s i n e w]
* eu":
[e w]
* théo:
[t e o]
Occurrences:
19,128
Examples:
* livro:
[l i v ʁ o]
* rolar:
[ʁ o l ɐ ɾ]
* colei:
[k o l ɛ j]
* sadio:
[s ɐ d i o]

Open-Mid
Occurrences:
21,918
Examples:
* dente:
[d ɛ n t ɛ]
* neve?:
[n ɛ v ɛ]
* colei:
[k o l ɛ j]
* detém:
[d ɛ t ẽ]
Occurrences:
481
Examples:
* após:
[ɐ p ɔ ʃ]
* prós:
[p ɾ ɔ ʃ]
* "só:
[s ɔ]
* cópia:
[k ɔ p i ɐ]
Occurrences:
27,309
Examples:
* rolar:
[ʁ o l ɐ ɾ]
* nara:
[n ɐ ɾ ɐ]
* mudar:
[m u d ɐ ɾ]
* sadio:
[s ɐ d i o]

Open
Occurrences:
2,419
Examples:
* sai?:
[s a j]
* baixe:
[b a j k s ɛ]
* táxi:
[t a k s i]
* baixa:
[b a j k s ɐ]

Nasal Vowels#

Front

Near-Front

Central

Near-Back

Back

Close
Occurrences:
77
Examples:
* fim:
[f ĩ]
* tim:
[t ĩ]
* salim:
[s ɐ l ĩ]
* alvin:
[ɐ l v ĩ]
Occurrences:
16
Examples:
* num:
[n ũ]
* simum:
[s i m ũ]
* nun:
[n ũ]
* rum:
[ʁ ũ]

Close-Mid
Occurrences:
24
Examples:
* detém:
[d ɛ t ẽ]
* além:
[ɐ l ẽ]
* obtém:
[o b t ẽ]
* amém:
[ɐ m ẽ]
Occurrences:
145
Examples:
* alfon:
[ɐ l f õ]
* timon:
[t i m õ]
* som:
[s õ]
* jhon:
[ʒ õ]

Open-Mid
Occurrences:
294
Examples:
* ontem:
[o n t ɛ̃]
* sem:
[s ɛ̃]
* caem:
[k ɐ ɛ̃]
* veem:
[v ɛ ɛ̃]
Occurrences:
1,849
Examples:
* taran:
[t ɐ ɾ ɐ̃]
* mães!:
[m ɐ̃ j̃ s]
* susan:
[s u z ɐ̃]
* cães.:
[k ɐ̃ j̃ s]

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