#How to build real-time audio transcription?

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dusty turret
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Hi, i am trying to build a real-time audio transcription feature.
I am taking the audio from navigator.mediaDevices.getDisplayMedia().
Which openai api can be use to transcript the audio in Realtime?

trail wrenBOT
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Hi @dusty turret. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

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To build a real-time audio transcription feature using OpenAI's APIs, you can consider using the Realtime API with WebRTC. This API allows you to connect client-side applications to a Realtime model through a WebRTC peer connection, which is suitable for handling real-time audio inputs.

Here are the steps you can follow to set up a real-time transcription system:

  1. Set Up WebRTC Connection: Use WebRTC to capture audio from the user's device. You can use navigator.mediaDevices.getDisplayMedia() to capture audio streams.

  2. Authenticate with an Ephemeral API Key:

    • Generate an ephemeral API key using a standard API key on your server. This key is used to authenticate the WebRTC session with the OpenAI Realtime API.
    • Ensure that the ephemeral key is used for client-side authentication to maintain security.

  3. Configure the Realtime API Session:

    • Once the WebRTC connection is established, configure the session to enable audio transcription. You may need to send a session.update message after the WebRTC data channel opens to ensure the transcription model is correctly enabled.

  4. Handle Transcription Events:

    • Set up event listeners to handle transcription results. You can listen for events like conversation.item.input_audio_transcription.completed to receive the transcribed text.

For more detailed guidance, you can refer to the Realtime API with WebRTC documentation to understand how to configure and use the API effectively.

If you encounter issues with transcription returning null, ensure that you are sending a session.update message after the WebRTC data channel opens, as this step is crucial for enabling the transcription model during the session.

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For further assistance, you can also explore the OpenAI Realtime API documentation for more information on setting up and managing sessions.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

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