# Bytedance Seed Speech Text to Speech API

> Text-to-speech na may maraming preset voice, control sa bilis, pitch at volume, at mga instruction sa istilo ng pagsasalita

Kino-convert ang hanggang 5000 character ng `text` sa audio. Pumili ng `voice`, at optional na pilitin ang isang `language` o panatilihing naka-on ang auto-detection. Saklaw ng `speed` at `volume` ang 0.5 hanggang 2, ang `pitch` ay nagshi-shift mula -12 hanggang 12 semitone, at ginagabayan ng `voice_instruction` ang paraan ng pagbigkas. Ang output ay mp3 o opus sa sample rate mula 8000 hanggang 48000 Hz.

- Model id: `bytedance/seed-speech/tts/v2`
- Made by: ByteDance
- Category: Text to Speech
- Output: audio
- Price: $0.03 / 1000 characters (cheapest run $0.03 (30 API credits))
- Run: `POST https://api.doitong.ru/v1/run/bytedance/seed-speech/tts/v2`
- Quote: `POST https://api.doitong.ru/v1/quote/bytedance/seed-speech/tts/v2`
- Docs page: https://doitong.com/fil/developers/models/bytedance/seed-speech/tts/v2

## Pricing

Price: **$0.03 / 1000 characters**. Billed per character of `text` (the price is per 1000 characters).

The full example input below costs $0.002 = 2 API credits (50 characters × 30 API credits / 1000 characters).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/bytedance/seed-speech/tts/v2` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `text` |  | string | yes |  | ≤ 5000 characters | Text na iko-convert sa synthesized speech. |
| `voice` |  | enum (string) | no | `stokie_en` | `vivi_mixed_en_zh_ja_es_id`, `mindy_en_es_id_pt_zh`, `stokie_en`, `dacey_en`, `tim_en`, `kian_en_zh`, `cedric_en_zh`, `sophie_en_zh`, `jean_en_zh`, `magnus_en_zh`, `mabel_en_zh`, `nadia_en_zh`, `opal_en_zh`, `pearl_en_zh`, `quentin_en_zh`, `vienna_mixed_en_zh`, `alina_mixed_en_zh`, `corinne_mixed_en_zh`, `esther_mixed_en_zh`, `freya_mixed_en_zh`, `gigi_mixed_en_zh`, `holly_mixed_en_zh`, `lyla_mixed_en_zh`, `daisy_mixed_en_zh`, `tracy_es_zh`, `jess_ja_es_id_pt_en_zh`, `pinky_es_ko_mixed_en_zh`, `sweety_ja_es`, `sandy_es_mixed_en_zh`, `sven_de`, `minimi_ja`, `usseau_fr`, `felipe_es`, `han_id`, `martins_pt`, `enzo_it`, `shane_ko`, `bonnie_zh`, `felix_zh`, `celeste_zh`, `monkey_king_zh` | Preset ng synthesis voice, na tinutukoy ng pangalan na naglalaman din ng mga supported language code. Maaaring magkahiwalay ang language support, gaya ng 'en_zh', o magbigay-daan sa tuloy-tuloy na paghahalo ng English–Chinese, na ipinapahiwatig ng 'mixed_en_zh'. |
| `output_format` |  | enum (string) | no | `mp3` | `mp3`, `opus` | Encoding ng audio output: ang 'mp3' ay lumilikha ng MP3, habang ang 'opus' ay lumilikha ng Opus na naka-package sa Ogg container. |
| `sample_rate` |  | enum (integer) | no | `24000` | `8000`, `16000`, `22050`, `24000`, `32000`, `44100`, `48000` | Sampling frequency sa Hz para sa output audio. |
| `speed` |  | number | no | `1` | 0.5 – 2 | Multiplier ng speech rate: ang 1.0 ay normal na bilis, ang 0.5 ay kalahating bilis, at ang 2.0 ay dobleng bilis. |
| `volume` |  | number | no | `1` | 0.5 – 2 | Multiplier ng volume: ang 1.0 ay normal na volume, ang 0.5 ay kalahating volume, at ang 2.0 ay dobleng volume. |
| `pitch` |  | integer | no | `0` | -12 – 12 | Pagsasaayos ng pitch ng voice, sinusukat sa semitone: hindi binabago ng 0 ang pitch, ibinababa ito ng isang octave ng -12, at itinataas ito ng isang octave ng 12. |
| `language` |  | enum (string) \| null | no |  | `zh`, `en`, `ja`, `es-mx`, `id`, `pt-br`, `ko`, `it`, `de`, `fr` | Override sa wika ng pagbasa: kapag hindi ibinigay, awtomatiko ang detection at maaaring tuloy-tuloy na maghalo ng Chinese at English ang bilingual voices; kapag ibinigay, hindi pinapagana ang detection at nililimitahan ang pagbasa sa isang wika. Pumili ng Chinese gamit ang zh, English gamit ang en, Japanese gamit ang ja, Mexican Spanish gamit ang es-mx, Indonesian gamit ang id, Brazilian Portuguese gamit ang pt-br, Korean gamit ang ko, Italian gamit ang it, German gamit ang de, o French gamit ang fr. |
| `voice_instruction` |  | string \| null | no |  |  | Opsyonal na natural-language instruction para sa delivery, gaya ng 'Speak in a cheerful tone' o 'Could you speak a bit slower?'. Maaari nitong gabayan ang tono, emosyon, volume, at bilis. |

## Example input

Required parameters only:

```json
{
  "text": "Hello from Doitong. This is a short test sentence."
}
```

A fuller example:

```json
{
  "text": "Hello from Doitong. This is a short test sentence."
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.ru/v1/run/bytedance/seed-speech/tts/v2?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hello from Doitong. This is a short test sentence."
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.ru/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.ru/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/bytedance/seed-speech/tts/v2?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "text": "Hello from Doitong. This is a short test sentence."
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.ru/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "text": "Hello from Doitong. This is a short test sentence.",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/bytedance/seed-speech/tts/v2", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.ru/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "bytedance/seed-speech/tts/v2",
      "input": {
        "text": "Hello from Doitong. This is a short test sentence."
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "bytedance/seed-speech/tts/v2",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 2,
    "usd": "0.002",
    "charged": 2,
    "refunded": 0
  },
  "input": {
    "text": "Hello from Doitong. This is a short test sentence."
  },
  "output": {
    "audio": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp3",
      "content_type": "audio/mpeg",
      "file_name": "0-output.mp3",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "audio",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp3",
      "content_type": "audio/mpeg",
      "file_size": 1843200,
      "duration": 12,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `audio` | object {url, content_type, file_name, file_size} | Audio file na ginawa sa pagbuo. |

## Related models

- [Eleven v4 Text to Speech](https://doitong.com/developers/models/elevenlabs/tts/eleven-v4.md) (`elevenlabs/tts/eleven-v4`): $0.08 / 1000 characters
- [MiniMax Speech 2.8 HD](https://doitong.com/developers/models/minimax/speech-2.8-hd.md) (`minimax/speech-2.8-hd`): $0.10 / 1000 characters
- [Async Text to Speech Pro V1.0](https://doitong.com/developers/models/async/tts-pro/v1.0.md) (`async/tts-pro/v1.0`): $0.01 / 1000 characters
- [Chatterbox · Speech to Speech](https://doitong.com/developers/models/chatterbox/speech-to-speech.md) (`chatterbox/speech-to-speech`): $0.015 / minute of input audio
- [Chatterbox · Text to Speech](https://doitong.com/developers/models/chatterbox/text-to-speech.md) (`chatterbox/text-to-speech`): $0.025 / 1000 characters
- [Chatterbox · Text to Speech · Multilingual](https://doitong.com/developers/models/chatterbox/text-to-speech/multilingual.md) (`chatterbox/text-to-speech/multilingual`): $0.025 / 1000 characters
- [Chatterboxhd · Speech to Speech](https://doitong.com/developers/models/resemble-ai/chatterboxhd/speech-to-speech.md) (`resemble-ai/chatterboxhd/speech-to-speech`): $0.02 / minute of input audio
- [Chatterboxhd · Text to Speech](https://doitong.com/developers/models/resemble-ai/chatterboxhd/text-to-speech.md) (`resemble-ai/chatterboxhd/text-to-speech`): $0.0108 / run

## Links

- HTML page: https://doitong.com/developers/models/bytedance/seed-speech/tts/v2
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=bytedance/seed-speech/tts/v2
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/bytedance/seed-speech/tts/v2