Sound Effect (SFX) Generator

This skill generates a high-quality sound effect from a simple text description, powered by the ElevenLabs SFX API.

When to Use

This skill is typically called by the audio-conductor when a request is classified as a sound effect. It can also be used directly when you know you need a specific sound effect.

• User says: "I need the sound of a laser blast."
• User says: "Generate a sound of a crowd cheering."

Core Principles

• Simplicity: Takes a simple text prompt and returns an audio file.
• Quality Control: Automatically validates the generated audio and can retry if the quality is poor.
• Parameter Tuning: Allows for fine-tuning of duration and prompt influence for more creative control.

Workflow

1. Receive SFX Request: The skill is triggered with a prompt and optional duration_seconds.
2. Set Generation Parameters: It prepares the request for the ElevenLabs SFX API, consulting sfx-api-kb.md for defaults and limits.
   • text: The user's prompt.
   • duration_seconds: (Optional) Target length between 0.5 and 30 seconds.
   • prompt_influence: (Optional) A value between 0 and 1 to control creativity vs. prompt adherence. Defaults to 0.3.
3. Execute Generation: It calls the ElevenLabs SFX API (/v1/sound-generation).
4. Quality Validation: It performs a basic check on the output to ensure it's a valid audio file and meets a minimum quality standard (e.g., not silent, no obvious clipping).
5. Error Handling & Retry: If the generation fails or the quality is unacceptable, it can retry up to 2 times.
6. Output Audio File: It returns the final sfx.mp3 file and its metadata.

Input: SFXRequest Schema

prompt: "A futuristic spaceship door opening with a pneumatic hiss."
# Optional parameters
params:
  duration_seconds: 3.5
  prompt_influence: 0.5

Output: SFXOutput Schema

sfx_output:
  audio_file: "spaceship_door_hiss.mp3"
  audio_url: "https://..."
  duration_ms: 3489
  model_used: "eleven_text_to_sound_v2"
  request_details:
    prompt: "A futuristic spaceship door opening with a pneumatic hiss."

References

• sfx-api-kb.md: Defines the ElevenLabs SFX API specifications, parameter details, and best practices.