---
pretty_name: DuplexChat
license: mit
language:
- en
- ja
task_categories:
- audio-to-audio
tags:
- full-duplex
- spoken-dialogue
- speech
- podcast
configs:
- config_name: en
  data_files: duplexchat_manifest_en.jsonl.gz
- config_name: ja
  data_files: duplexchat_manifest_ja.jsonl.gz
viewer: false
---

# DuplexChat

large-scale, two-speaker, full-duplex
spoken-dialogue corpus built from public podcast feeds. This repository
distributes **no audio** 

## Contents

| File | Rows | Hours |
|------|-----:|------:|
| `duplexchat_manifest_en.jsonl.gz` | 15,304,412 | 282,634 |
| `duplexchat_manifest_ja.jsonl.gz` |  7,329,011 | 132,723 |

`manifest_counts.json` holds the same totals.

## Row schema

Each line is one two-speaker dialogue clip:

```json
{
  "language": "en-us",
  "rss_url": "https://.../podcast/rss",
  "audio_url": "https://.../episode.mp3",
  "dialogue_idx": 1,
  "episode_start_sec": 80.22,
  "episode_end_sec": 708.44,
  "duration_sec": 628.22,
  "speakers": ["SPEAKER_04", "SPEAKER_02"],
  "episode_duration_sec": 2165.52
}
```

- `rss_url` — the source podcast feed.
- `audio_url` — the source episode audio (download target).
- `episode_start_sec` / `episode_end_sec` — the dialogue span within the episode.
- `duration_sec` — span length.
- `speakers` — the two diarized speaker labels for the clip.

Rows are deduplicated globally by `(audio_url, dialogue_idx)`.

## Reconstruction

1. Download the episode at `audio_url`.
2. Slice the segment `[episode_start_sec, episode_end_sec]`.
3. Re-run the  speech separation/restoration to
   recover one-speaker-per-channel stereo audio.

The construction pipeline is released separately.

## License and copyright
MIT
Note that all rights regarding the audio content and RSS content belongs to the respective right holders.