d41k4n/piper-swissdial

Piper Voices — Swiss German (de_CH / SwissDial v1.1)

Eight single-speaker Swiss-German (Schwiizerdütsch) text-to-speech voice models trained for the Piper VITS engine (22,050 Hz, medium quality).

Each voice was fine-tuned from de_DE-thorsten-medium on the corresponding regional speaker from the SwissDial v1.1 corpus published by ETH Zürich (Media Technology Center).

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Included Voices

Voice Key	Dialect / Region	Native Name	Gender	Training Utterances	Directory Path
de_CH-swissdial_ag-medium	Aargau	Aargauerdütsch	Female	2,748	de/de_CH/swissdial_ag/medium/
de_CH-swissdial_be-medium	Bern	Bärndütsch	Female	2,700	de/de_CH/swissdial_be/medium/
de_CH-swissdial_bs-medium	Basel	Baseldytsch	Female	2,713	de/de_CH/swissdial_bs/medium/
de_CH-swissdial_gr-medium	Graubünden	Bündnerdütsch	Male	10,475	de/de_CH/swissdial_gr/medium/
de_CH-swissdial_lu-medium	Luzern	Lozärnerdütsch	Male	2,715	de/de_CH/swissdial_lu/medium/
de_CH-swissdial_sg-medium	St. Gallen	Ostschwiizerisch	Male	2,752	de/de_CH/swissdial_sg/medium/
de_CH-swissdial_vs-medium	Valais	Wallisertiitsch	Female	2,753	de/de_CH/swissdial_vs/medium/
de_CH-swissdial_zh-medium	Zürich	Züridütsch	Female	4,065	de/de_CH/swissdial_zh/medium/

A Piper-compatible catalog manifest with file sizes and MD5 checksums is available at voices.json (and voices_de_CH.json).

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Usage with piper

These models expect Swiss-German dialect text and use standard German phonemization ("espeak": {"voice": "de"} in .onnx.json), so they work out-of-the-box with unmodified piper binaries on Windows, Linux, and macOS:

echo "Grüezi wohl, mir sind parat für de Isatz mit em Rettigshelikopter." | \
  piper --model de_CH-swissdial_zh-medium.onnx \
        --config de_CH-swissdial_zh-medium.onnx.json \
        --output_file output.wav

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License & Attribution

• License: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
• Source Dataset: SwissDial v1.1 by ETH Zürich (Media Technology Center) — P. Dogan-Schönberger, J. Mäder, T. Hofmann, "SwissDial: Parallel Multidialectal Corpus of Spoken Swiss German".
• Base Pretrained Checkpoint: de_DE-thorsten-medium (Thorsten Müller & Michael Hansen, CC0).

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Changelog

• v1.0.1: Added speaker gender metadata (female / male) to voices.json, .onnx.json, and MODEL_CARD files.
• v1.0.0: Initial release of all 8 Swiss-German (de_CH) SwissDial medium Piper voices (ag, be, bs, gr, lu, sg, vs, zh).