Happy Audio Gen

happy-audio-gen

Turns text into speech across 6 providers through one CLI. All providers are synchronous (TTS is fast — typically under 10 seconds) except Bailian's voice-design flow (which is still covered but uses a longer poll window).

Quick usage

# Shortest path — OpenAI default voice
bun scripts/main.ts --text "Hello, world" --out ./hello.mp3

# Chinese, MiniMax
bun scripts/main.ts --provider minimax --text "大家好" --voice male-qn-qingse --out ./hello.mp3

# Long-form, Bailian (auto-splits by sentence)
bun scripts/main.ts --provider bailian --textfiles ./script.md --out ./narration.mp3

When to invoke this skill

• User asks to synthesize speech / TTS / read aloud / narrate / dub / make a voice-over.
• User asks to convert script / text / article into audio.
• User names a TTS voice or model.

Do not route here when the user wants to transcribe audio → text (that's STT, different domain), or edit / mix audio files (use a dedicated audio editor).

Step 0: Preflight (BLOCKING)

1. Locate EXTEND.md:

   • ./.happy-skills/happy-audio-gen/EXTEND.md
   • $XDG_CONFIG_HOME/happy-skills/happy-audio-gen/EXTEND.md
   • ~/.happy-skills/happy-audio-gen/EXTEND.md

   If none found, run bun scripts/main.ts --setup and walk the user through references/config/first-time-setup.md.

2. Verify at least one provider has credentials (env var or 1Password reference).

3. Verify Bun is available. Fallback: npx -y bun.

Step 1: Choose provider

Preference order:

1. --provider <id>
2. EXTEND.md default_provider
3. Auto-detect env vars: openai > elevenlabs > bailian > minimax > siliconflow > playht

Pick by language / voice intent:

• English, natural + fast → openai (gpt-4o-mini-tts / tts-1).
• Multilingual, voice cloning → elevenlabs.
• Chinese, long-form → bailian (qwen-tts auto-chunks long scripts) or minimax.
• Chinese dialect / voice design → bailian (voice-design with qwen3-tts-vd) or siliconflow (CosyVoice2).
• Ultra-realistic, short-form → playht (2.0).

Step 2: Fill parameters

• --text or --textfiles: input. Always quote.
• --out <path>: REQUIRED. Extension determines format (.mp3 / .wav / .ogg / .flac).
• --voice <id>: provider-specific. See references/voices.md for the short list of well-known voices.
• --rate 0.5..2.0: speaking rate.
• --instruction "...": voice direction (only openai gpt-4o-mini-tts and siliconflow honor this).
• --language <code>: en, zh, ja — only a few providers honor this explicitly.

Step 3: Run

bun scripts/main.ts \
  --provider openai \
  --model gpt-4o-mini-tts \
  --voice alloy \
  --text "..." \
  --out ./out.mp3

JSON mode:

{ "success": true, "provider": "openai", "model": "gpt-4o-mini-tts", "voice": "alloy", "output": "/abs/out.mp3", "size_bytes": 76032, "format": "mp3" }

Step 4: Long text handling

• happy-audio-gen automatically splits long input for providers that cap per-call length (Bailian ≤ 200 Chinese chars per call). Chunks are concatenated byte-for-byte on output.
• For best fidelity with concatenated MP3s, stitch the segments with ffmpeg afterward rather than relying on byte concat.

Step 5: Errors

• [openai] OpenAI TTS 400 with invalid voice → the voice name is not supported by the model. Use one of alloy, ash, coral, echo, fable, onyx, nova, sage, shimmer.
• [minimax] ... 2049 invalid api key → try MINIMAX_BASE_URL=https://api.minimaxi.com/v1 (different region).
• [bailian] ... 400 DataInspectionFailed → Aliyun content filter. Surface to the user.
• [elevenlabs] 401 → key invalid or subscription expired.

References

• references/providers.md — per-provider env vars, default models, voice lists.
• references/voices.md — curated voices for each provider.
• references/error_codes.md — common errors and fixes.
• references/config/first-time-setup.md
• references/config/extend-schema.md
• assets/EXTEND.template.md