Volcengine TTS Audio Synthesis

Text-to-speech generation on Volcengine (ByteDance) speech services. Use when users need narration, multi-language speech output, voice selection, or TTS troubleshooting. Supports online one-shot HTTP API (openspeech.bytedance.com).

Category: provider

Volcengine 语音合成 TTS

Validation

mkdir -p output/volcengine-ai-audio-tts
python -m py_compile skills/ai/audio/volcengine-ai-audio-tts/scripts/generate_tts.py && echo "py_compile_ok" > output/volcengine-ai-audio-tts/validate.txt

Pass criteria: command exits 0 and output/volcengine-ai-audio-tts/validate.txt is generated.

Output And Evidence

• Save generated audio files, request payloads, and response metadata to output/volcengine-ai-audio-tts/.
• Keep one validation log per execution.

Prerequisites

• Python 3.8+. No extra SDK required (uses requests and stdlib).
• Install: pip install requests
• Set environment variables (from Volcengine 豆包语音控制台):
  • VOLCENGINE_TTS_APP_ID — 应用 ID
  • VOLCENGINE_TTS_TOKEN — 应用 Token（用于 Authorization: Bearer;${token}）
  • VOLCENGINE_TTS_CLUSTER — 业务集群，如 volcano_tts（标准音色）

Optional: use .env in repo root or script directory; script will load them.

Normalized interface (tts.generate)

Request

• text (string, required) — 合成文本，UTF-8，单次建议 ≤1024 字节
• voice_type (string, required) — 音色，见 发音人参数列表，如 BV700_streaming
• encoding (string, optional) — 编码格式：pcm | wav | mp3 | ogg_opus，默认 mp3
• rate (int, optional) — 采样率 8000/16000/24000，默认 24000
• speed_ratio (float, optional) — 语速 [0.2, 3]，默认 1.0
• volume_ratio (float, optional) — 音量 [0.1, 3]，默认 1.0
• pitch_ratio (float, optional) — 音高 [0.1, 3]，默认 1.0
• language (string, optional) — 语言，如 cn

Response

• audio_path (string) — 本地保存的音频文件路径
• sample_rate (int)
• format (string)
• duration_ms (string, when returned by API)
• code (int) — 3000 表示成功

Quick start (Python script)

# 使用内联 JSON 请求
python skills/ai/audio/volcengine-ai-audio-tts/scripts/generate_tts.py \
  --request '{"text":"你好，这是一段测试语音。","voice_type":"BV700_streaming"}' \
  --output output/volcengine-ai-audio-tts/audio/out.mp3

# 使用请求文件
python skills/ai/audio/volcengine-ai-audio-tts/scripts/generate_tts.py \
  --file request.json \
  --output output/volcengine-ai-audio-tts/audio/out.wav \
  --print-response

Operational guidance

• 每次请求的 reqid 需唯一，脚本内使用 UUID。
• 长文本请分段多次调用或使用异步长文本接口。
• 音色与 cluster 需与控制台一致；复刻音色使用 speaker id 作为 voice_type。
• 遇 429 请降低并发或增加间隔。

Output location

• Default output: output/volcengine-ai-audio-tts/audio/
• Override base dir with OUTPUT_DIR.

Workflow

1. Confirm user intent, text, voice, and output format.
2. Run one minimal request to verify credentials and cluster/voice_type.
3. Execute the target synthesis with explicit parameters.
4. Verify results and save output/evidence files.

References

• references/api_reference.md — 请求/响应参数与错误码
• 在线语音合成 API - HTTP 一次性合成
• 参数基本说明
• 发音人参数列表
• Source list: references/sources.md