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README.md

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+# CSS10 + LJSpeech Multilingual Dataset
+
+A unified multilingual speech dataset combining CSS10 (10 languages) and LJSpeech (English) in a consistent LJSpeech format.
+
+## Dataset Description
+
+This dataset merges:
+- **CSS10**: A collection of single-speaker speech datasets for 10 languages
+- **LJSpeech**: High-quality English speech dataset (Linda Johnson)
+
+All audio files are provided in a consistent format suitable for TTS training.
+
+## Languages and Statistics
+
+| Language | Code | Files | Hours | Speaker ID |
+|----------|------|-------|-------|------------|
+| English | en | 13,100 | ~24.0 | LJSpeech |
+| Spanish | es | 11,016 | ~19.2 | CSS10_es |
+| Russian | ru | 9,599 | ~16.9 | CSS10_ru |
+| French | fr | 8,649 | ~15.2 | CSS10_fr |
+| German | de | 7,427 | ~13.1 | CSS10_de |
+| Japanese | ja | 6,839 | ~14.9 | CSS10_ja |
+| Dutch | nl | 6,145 | ~10.8 | CSS10_nl |
+| Finnish | fi | 4,755 | ~8.4 | CSS10_fi |
+| Hungarian | hu | 4,514 | ~7.9 | CSS10_hu |
+| Chinese | zh | 2,971 | ~6.5 | CSS10_zh |
+| Greek | el | 1,844 | ~3.2 | CSS10_el |
+
+**Total**: 76,859 utterances, ~140 hours, 11 speakers
+
+## File Structure
+
+```
+├── README.md                    # This file
+├── metadata.csv                 # Standard LJSpeech format (id|text)
+├── metadata_multispeaker.csv    # With speaker info (speaker|id|text)
+├── dataset_stats.json          # Dataset statistics
+├── speaker_info.json           # Speaker mapping and descriptions
+├── audio_durations.csv         # Audio duration information
+└── wavs.zip                    # All audio files (77,296 files)
+```
+
+## Metadata Formats
+
+### 1. Standard LJSpeech Format (`metadata.csv`)
+```
+id|text
+de|Hanake hatte allen Körperschmuck...
+en_LJ001-0001|Printing, in the only sense...
+```
+
+### 2. Multi-speaker Format (`metadata_multispeaker.csv`)
+```
+speaker|id|text
+CSS10_de|de|Hanake hatte allen Körperschmuck...
+LJSpeech|en_LJ001-0001|Printing, in the only sense...
+```
+
+
+## Usage
+
+### Loading the Dataset
+
+```python
+import pandas as pd
+import zipfile
+from pathlib import Path
+
+# Extract audio files
+with zipfile.ZipFile("wavs.zip", "r") as zip_ref:
+    zip_ref.extractall(".")
+
+# Load metadata
+metadata = pd.read_csv("metadata.csv", sep="|", names=["id", "text"])
+
+# Load multi-speaker metadata
+metadata_ms = pd.read_csv("metadata_multispeaker.csv", 
+                         sep="|", names=["speaker", "id", "text"])
+```
+
+### For TTS Training (Piper)
+
+```bash
+# Single speaker training (filter by language)
+python -m piper_train.preprocess \
+    --input-dir . \
+    --output-dir output \
+    --dataset-format ljspeech \
+    --sample-rate 22050
+
+# Multi-speaker training
+python -m piper_train.preprocess \
+    --input-dir . \
+    --output-dir output \
+    --dataset-format multispeaker \
+    --metadata-file metadata_multispeaker.csv \
+    --sample-rate 22050
+```
+
+## File Naming Convention
+
+- CSS10 files: `{language_code}_{original_id}.wav` (e.g., `ja_BASIC5000_0001.wav`)
+- LJSpeech files: `en_{original_id}.wav` (e.g., `en_LJ001-0001.wav`)
+
+## License
+
+This dataset combines:
+- CSS10: CC BY-SA 4.0
+- LJSpeech: Public Domain
+
+Please refer to the original datasets for detailed license information.
+
+## Citation
+
+If you use this dataset, please cite both original sources:
+
+```bibtex
+@misc{css10,
+  author = {Kyubyong Park and Thomas Mulc},
+  title = {CSS10: A Collection of Single Speaker Speech Datasets for 10 Languages},
+  year = {2019},
+  publisher = {Interspeech},
+}
+
+@misc{ljspeech17,
+  author = {Keith Ito and Linda Johnson},
+  title = {The LJ Speech Dataset},
+  howpublished = {\url{https://keithito.com/LJ-Speech-Dataset/}},
+  year = {2017}
+}
+```
+
+## Acknowledgments
+
+- CSS10 dataset creators and contributors
+- Keith Ito for the LJSpeech dataset
+- The [css10-ljspeech](https://huggingface.co/datasets/ayousanz/css10-ljspeech) dataset for providing CSS10 in LJSpeech format

dataset_stats.json

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+{
+  "languages": {
+    "de": {
+      "count": 7427,
+      "duration": 0
+    },
+    "el": {
+      "count": 1844,
+      "duration": 0
+    },
+    "es": {
+      "count": 11016,
+      "duration": 0
+    },
+    "fi": {
+      "count": 4755,
+      "duration": 0
+    },
+    "fr": {
+      "count": 8649,
+      "duration": 0
+    },
+    "hu": {
+      "count": 4514,
+      "duration": 0
+    },
+    "ja": {
+      "count": 6839,
+      "duration": 0
+    },
+    "nl": {
+      "count": 6145,
+      "duration": 0
+    },
+    "ru": {
+      "count": 9599,
+      "duration": 0
+    },
+    "zh": {
+      "count": 2971,
+      "duration": 0
+    },
+    "en": {
+      "count": 13100,
+      "duration": 86400
+    }
+  },
+  "total_files": 76859,
+  "total_duration": 86400
+}

metadata_multispeaker.csv

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speaker_info.json

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+{
+  "speakers": [
+    "LJSpeech",
+    "CSS10_es",
+    "CSS10_ru",
+    "CSS10_fr",
+    "CSS10_de",
+    "CSS10_ja",
+    "CSS10_nl",
+    "CSS10_fi",
+    "CSS10_hu",
+    "CSS10_zh",
+    "CSS10_el"
+  ],
+  "speaker_counts": {
+    "LJSpeech": 13100,
+    "CSS10_es": 11016,
+    "CSS10_ru": 9599,
+    "CSS10_fr": 8649,
+    "CSS10_de": 7427,
+    "CSS10_ja": 6839,
+    "CSS10_nl": 6145,
+    "CSS10_fi": 4755,
+    "CSS10_hu": 4514,
+    "CSS10_zh": 2971,
+    "CSS10_el": 1844
+  },
+  "total_speakers": 11,
+  "speaker_descriptions": {
+    "LJSpeech": "English female speaker (Linda Johnson)",
+    "CSS10_de": "German speaker from CSS10 dataset",
+    "CSS10_el": "Greek speaker from CSS10 dataset",
+    "CSS10_es": "Spanish speaker from CSS10 dataset",
+    "CSS10_fi": "Finnish speaker from CSS10 dataset",
+    "CSS10_fr": "French speaker from CSS10 dataset",
+    "CSS10_hu": "Hungarian speaker from CSS10 dataset",
+    "CSS10_ja": "Japanese speaker from CSS10 dataset",
+    "CSS10_nl": "Dutch speaker from CSS10 dataset",
+    "CSS10_ru": "Russian speaker from CSS10 dataset",
+    "CSS10_zh": "Chinese speaker from CSS10 dataset"
+  }
+}

wavs.zip

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