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software-mansion/
react-native-executorch-kokoro

Name: react-native-executorch-kokoro
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kokoro

This repository hosts the kokoro models exported for the React Native ExecuTorch library as ExecuTorch .pte programs, ready to run on device.

Upstream model: Kokoro

Variants

Path	Component	Backend	Precision
`coreml/german/duration_predictor_de_coreml_fp32.pte`	duration_predictor	coreml	fp32
`coreml/german/synthesizer_de_coreml_fp32.pte`	synthesizer	coreml	fp32
`coreml/polish/duration_predictor_pl_coreml_fp32.pte`	duration_predictor	coreml	fp32
`coreml/polish/synthesizer_pl_coreml_fp32.pte`	synthesizer	coreml	fp32
`coreml/standard/duration_predictor_std_coreml_fp32.pte`	duration_predictor	coreml	fp32
`coreml/standard/synthesizer_std_coreml_fp32.pte`	synthesizer	coreml	fp32
`xnnpack/german/duration_predictor_de_xnnpack_fp32.pte`	duration_predictor	xnnpack	fp32
`xnnpack/german/synthesizer_de_xnnpack_fp32.pte`	synthesizer	xnnpack	fp32
`xnnpack/polish/duration_predictor_pl_xnnpack_fp32.pte`	duration_predictor	xnnpack	fp32
`xnnpack/polish/synthesizer_pl_xnnpack_fp32.pte`	synthesizer	xnnpack	fp32
`xnnpack/standard/duration_predictor_std_xnnpack_fp32.pte`	duration_predictor	xnnpack	fp32
`xnnpack/standard/synthesizer_std_xnnpack_fp32.pte`	synthesizer	xnnpack	fp32

Repository structure

config.json                                               28 B
coreml/german/config.json                                 2.7 kB
coreml/german/duration_predictor_de_coreml_fp32.pte       64.9 MB
coreml/german/synthesizer_de_coreml_fp32.pte              282 MB
coreml/polish/config.json                                 2.7 kB
coreml/polish/duration_predictor_pl_coreml_fp32.pte       64.9 MB
coreml/polish/synthesizer_pl_coreml_fp32.pte              282 MB
coreml/standard/config.json                               2.7 kB
coreml/standard/duration_predictor_std_coreml_fp32.pte    64.9 MB
coreml/standard/synthesizer_std_coreml_fp32.pte           282 MB
finetunes/kokoro_german_converted.pth                     312 MB
finetunes/kokoro_polish_converted.pth                     312 MB
phonemizer/de/phonemizer_de.pte                           6.8 MB
phonemizer/en-gb/lexicon.json                             6.4 MB
phonemizer/en-gb/phonemizer_en_gb.pte                     6.8 MB
phonemizer/en-gb/tags.json                                2.1 MB
phonemizer/en-us/lexicon.json                             6.0 MB
phonemizer/en-us/phonemizer_en_us.pte                     6.8 MB
phonemizer/en-us/tags.json                                2.1 MB
phonemizer/es/phonemizer_es.pte                           6.8 MB
phonemizer/fr/phonemizer_fr.pte                           6.8 MB
phonemizer/hi/phonemizer_hi.pte                           8.8 MB
phonemizer/it/phonemizer_it.pte                           6.8 MB
phonemizer/pl/phonemizer_pl.pte                           6.8 MB
phonemizer/pt/phonemizer_pt.pte                           6.8 MB
voices/af_heart.bin                                       510 kB
voices/af_river.bin                                       510 kB
voices/af_sarah.bin                                       510 kB
voices/am_adam.bin                                        510 kB
voices/am_michael.bin                                     510 kB
voices/am_santa.bin                                       510 kB
voices/bf_emma.bin                                        510 kB
voices/bm_daniel.bin                                      510 kB
voices/df_anna.bin                                        510 kB
voices/ef_dora.bin                                        510 kB
voices/em_alex.bin                                        510 kB
voices/ff_siwis.bin                                       510 kB
voices/hf_alpha.bin                                       510 kB
voices/hm_omega.bin                                       510 kB
voices/hm_psi.bin                                         510 kB
voices/if_sara.bin                                        510 kB
voices/im_nicola.bin                                      510 kB
voices/jm_kumo.bin                                        510 kB
voices/pf_dora.bin                                        510 kB
voices/pm_mateusz.bin                                     510 kB
voices/pm_santa.bin                                       510 kB
xnnpack/german/config.json                                4.7 kB
xnnpack/german/duration_predictor_de_xnnpack_fp32.pte     56.6 MB
xnnpack/german/synthesizer_de_xnnpack_fp32.pte            260 MB
xnnpack/polish/config.json                                4.7 kB
xnnpack/polish/duration_predictor_pl_xnnpack_fp32.pte     56.6 MB
xnnpack/polish/synthesizer_pl_xnnpack_fp32.pte            260 MB
xnnpack/standard/config.json                              4.7 kB
xnnpack/standard/duration_predictor_std_xnnpack_fp32.pte  56.6 MB
xnnpack/standard/synthesizer_std_xnnpack_fp32.pte         260 MB

Compatibility

These files are published for the ExecuTorch v1.4.1 runtime. ExecuTorch gives no forward compatibility guarantee, so an older runtime may fail to load them.

To use them in React Native ExecuTorch, pass the model constant shipped in the library's model registry to the corresponding task pipeline. See the documentation.

To load these files in your own ExecuTorch runtime, read the compatibility note first.

Model details

Kokoro synthesizes speech in 8 languages here, including fine-tuned Polish and German voices. The synthesizer and duration predictor support input shape dynamism over a range of 1 to 128 tokens.

Synthesis needs G2P (grapheme-to-phoneme) preprocessing, so this repository also ships the resources for it, not just the voice models:

phonemizer/ holds the data files for Phonemis plus per-language word-by-word phonemizer models, themselves in ExecuTorch format.
voices/ holds the pre-computed speaker embeddings.
xnnpack/ holds one directory per language variant, each with its own duration predictor and synthesizer.

A worked end-to-end call is in the exporter's inference example.

software-mansion/react-native-executorch-kokoro