Startup adds background sounds to OpenAI's silent video AI
- OpenAI released AI model Sora to generate video from text prompts, but without sound
- AI startup ElevenLabs added realistic background sounds to Sora videos
- ElevenLabs uses text prompts like "waves crashing" to generate matching audio
- Demo shows Sora videos with background sounds like city noises or robot beeps
- No word yet on when ElevenLabs will release the Sound Effects tech, but you can register interest