Generate chat-based sound effects with OpenAI and ElevenLabs

Description

Quick overview
This workflow turns an n8n chat message into a detailed sound-effect prompt using OpenAI, then generates an MP3 sound effect via the ElevenLabs Sound Generation API and replies in chat with the audio and the settings used.

How it works
Receives a message in n8n Chat describing the sound effect the user wants.
Uses OpenAI to rewrite the message into a single, literal ElevenLabs-ready sound prompt and to propose duration and prompt-influence settings as JSON.
Parses the JSON response, falls back to the original user text if parsing fails, and clamps duration (0.5–30s) and prompt influence (0–1) to valid ranges.
Calls the ElevenLabs sound-generation endpoint to create an MP3 file using the prompt and settings, retrying on failures.
Replies in chat with the generated MP3 and a text summary of the prompt and settings, or returns a friendly error message if generation fails.

Setup
Add an OpenAI API credential and select it for the OpenAI chat model used to generate the sound-effect prompt.
Create an ElevenLabs API key header-auth credential (header name xi-api-key) and select it for the ElevenLabs HTTP request.
Ensure n8n Chat is enabled in your n8n environment and test by sending a clear sound description (for example, “a heavy wooden door creaking open”).

Additional info
Generate sound effects from chat using OpenAI and ElevenLabs
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