HI, I'd like to connect a gender-recognition-by-voice tool with VAPI. I though of sending the user's audio input in real-time to the API of that tool, but I don't know how to do it. Is there a way to do it? If so, what would I need to do? I saw a really short VAPI forum post, in which there was teased that Websocket may be needed to create it.

To connect a gender-recognition-by-voice tool with VAPI and send real-time audio input, you can indeed use WebSockets for streaming audio data. Here’s a step-by-step guide on how to do it: 1. **Initiate a Voice Call**: Start a voice call using the VAPI API. This will allow you to capture the user's audio input.

bash
   curl 'https://api.vapi.ai/call/phone' \
     -H 'authorization: Bearer YOUR_API_KEY' \
     -H 'content-type: application/json' \
     --data-raw '{
       "assistantId": "YOUR_ASSISTANT_ID",
       "customer": {
         "number": "+12345678913"
       },
       "phoneNumberId": "YOUR_PHONE_NUMBER_ID"
     }'

2. **Enable Real-Time Streaming**: After initiating the call, you will receive a

listenUrl

. This URL is used to establish a WebSocket connection for real-time audio streaming. 3. **Connect to the WebSocket**: Use the

listenUrl

to connect to the WebSocket and start receiving audio data. Here’s a simple example in JavaScript:

javascript
   const WebSocket = require('ws');

   const ws = new WebSocket("wss://your.listen.url");

   ws.on('open', () => {
     console.log('WebSocket connection established');
   });

   ws.on('message', (data) => {
     // Send the audio data to your gender-recognition API here
     sendToGenderRecognitionAPI(data);
   });

   ws.on('close', () => {
     console.log('WebSocket connection closed');
   });

   ws.on('error', (error) => {
     console.error('WebSocket error:', error);
   });

4. **Process Audio Data**: In the

message

event of the WebSocket, you can send the received audio data to your gender-recognition API for processing. 5. **Handle Responses**: Make sure to handle any responses from the gender-recognition API as needed. ### Additional Considerations: - Ensure that your gender-recognition tool can accept real-time audio input and is compatible with the audio format being sent. - Be mindful of compliance and privacy regulations when handling audio data.

@User Is there any other way to do it? I've never used websockets before

You want to analyze the speaker's gender in real-time during VAPI calls by sending the audio stream to a gender recognition service. You can use VAPI's custom transcriber feature to create a WebSocket connection that will: 1\. Receive audio from VAPI in real-time 2\. Process and forward it to your gender recognition service 3\. Handle the responses and integrate them into your call flow Detailed Solution: 1\. First, set up your gender recognition WebSocket server. Here's a basic example:

import WebSocket from 'ws';
import { Server } from 'http';

const wss = new WebSocket.Server({ port: 8080 });

wss.on('connection', (ws) => {
  console.log('New connection established');

  ws.on('message', async (data, isBinary) => {
    if (isBinary) {
      // Handle binary audio data
      const audioBuffer = Buffer.from(data);
      // Send to your gender recognition API
      const gender = await yourGenderRecognitionAPI(audioBuffer);
      
      // Send back the result
      ws.send(JSON.stringify({
        type: 'transcriber-response',
        transcription: `Speaker gender: ${gender}`,
        channel: 'customer'
      }));
    } else {
      // Handle the initial configuration message
      console.log('Received config:', data.toString());
    }
  });
});

2\. Configure VAPI to use your custom transcriber:

const callConfig = {
  transcriber: {
    provider: 'custom-transcriber',
    server: {
      url: 'ws://your-server:8080',
      headers: {
        'Authorization': 'Bearer your-auth-token'
      }
    }
  }
  // ... other call configuration
};

Key points to note: \- VAPI sends audio in 16-bit PCM format \- Audio is sent as binary WebSocket frames \- The sample rate is specified in the initial configuration message \- You can send back results using the

transcriber-response

message type Let me know if you need any clarification or have questions about specific parts of the implementation!