Integrate Audio Generation

PREREQUISITE: Run +rw-check-compatibility first. Run +rw-fetch-api-reference to load the latest API reference before integrating. Requires +rw-setup-api-key for API credentials. Requires +rw-integrate-uploads for local audio/video files.

Help users add Runway audio generation to their server-side code.

Available Models

Model	Endpoint	Use Case	Cost
eleven_multilingual_v2	POST /v1/text_to_speech	Text to speech	1 credit/50 chars
eleven_text_to_sound_v2	POST /v1/sound_effect	Sound effect generation	1-2 credits
eleven_voice_isolation	POST /v1/voice_isolation	Isolate voice from audio	1 credit/6 sec
eleven_voice_dubbing	POST /v1/voice_dubbing	Dub audio to other languages	1 credit/2 sec
eleven_multilingual_sts_v2	POST /v1/speech_to_speech	Voice conversion	1 credit/3 sec

Text-to-Speech

Generate speech from text using the ElevenLabs multilingual model.

Node.js SDK

import RunwayML from '@runwayml/sdk';

const client = new RunwayML();

const task = await client.textToSpeech.create({
  model: 'eleven_multilingual_v2',
  promptText: 'Hello, welcome to our application!',
  voice: { type: 'runway-preset', presetId: 'Maya' }
}).waitForTaskOutput();

const audioUrl = task.output[0];

Python SDK

from runwayml import RunwayML

client = RunwayML()

task = client.text_to_speech.create(
    model='eleven_multilingual_v2',
    prompt_text='Hello, welcome to our application!',
    voice={ 'type': 'runway-preset', 'presetId': 'Maya' }
).wait_for_task_output()

audio_url = task.output[0]

Sound Effects

Generate sound effects from text descriptions.

const task = await client.soundEffect.create({
  model: 'eleven_text_to_sound_v2',
  promptText: 'Thunder rolling across a stormy sky'
}).waitForTaskOutput();

task = client.sound_effect.create(
    model='eleven_text_to_sound_v2',
    prompt_text='Thunder rolling across a stormy sky'
).wait_for_task_output()

Voice Isolation

Extract voice from audio with background noise.

// If using a local file, upload first
const upload = await client.uploads.createEphemeral(
  fs.createReadStream('/path/to/noisy-audio.mp3')
);

const task = await client.voiceIsolation.create({
  model: 'eleven_voice_isolation',
  audioUri: upload.runwayUri
}).waitForTaskOutput();

Voice Dubbing

Dub audio/video into other languages.

const task = await client.voiceDubbing.create({
  model: 'eleven_voice_dubbing',
  audioUri: 'https://example.com/speech.mp3',
  targetLang: 'es'  // Spanish
}).waitForTaskOutput();

Speech-to-Speech

Convert one voice to another.

const task = await client.speechToSpeech.create({
  model: 'eleven_multilingual_sts_v2',
  media: { type: 'audio', uri: 'https://example.com/original-speech.mp3' },
  voice: { type: 'runway-preset', presetId: 'Noah' }
}).waitForTaskOutput();

Integration Pattern

Express.js — Text-to-Speech Endpoint

import RunwayML from '@runwayml/sdk';
import express from 'express';

const client = new RunwayML();
const app = express();
app.use(express.json());

app.post('/api/text-to-speech', async (req, res) => {
  try {
    const { text, voiceId } = req.body;

    const task = await client.textToSpeech.create({
      model: 'eleven_multilingual_v2',
      promptText: text,
      voice: { type: 'runway-preset', presetId: voiceId || 'Maya' }
    }).waitForTaskOutput();

    res.json({ audioUrl: task.output[0] });
  } catch (error) {
    console.error('TTS failed:', error);
    res.status(500).json({ error: error.message });
  }
});

FastAPI — Sound Effects

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from runwayml import RunwayML

app = FastAPI()
client = RunwayML()

class SoundRequest(BaseModel):
    prompt: str

@app.post("/api/sound-effect")
async def generate_sound(req: SoundRequest):
    try:
        task = client.sound_effect.create(
            model='eleven_text_to_sound_v2',
            prompt_text=req.prompt
        ).wait_for_task_output()
        return {"audio_url": task.output[0]}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

Tips

• Output URLs expire in 24-48 hours. Download audio files to your own storage.
• For local audio files (voice isolation, dubbing, speech-to-speech), upload via +rw-integrate-uploads first.
• Voice IDs can be listed via the voices endpoint — see +rw-api-reference for details.
• Text-to-speech cost scales with text length: 1 credit per 50 characters.