Speech-to-Text WebSocket streaming examples

import asyncio
import json
import websockets

API_KEY = "YOUR_API_KEY"
AUDIO_FILE = "audio.wav"

async def transcribe():
    url = (
        "wss://api.telnyx.com/v2/speech-to-text/transcription"
        "?transcription_engine=Deepgram"
        "&model=nova-3"
        "&input_format=wav"
        "&interim_results=true"
    )
    headers = {"Authorization": f"Bearer {API_KEY}"}

    async with websockets.connect(url, extra_headers=headers) as ws:
        async def listen():
            async for message in ws:
                data = json.loads(message)
                prefix = "FINAL" if data.get("is_final") else "partial"
                print(f"[{prefix}] {data.get('transcript', '')}")

        listener = asyncio.create_task(listen())

        with open(AUDIO_FILE, "rb") as f:
            while chunk := f.read(4096):
                await ws.send(chunk)
                await asyncio.sleep(0.05)

        await asyncio.sleep(3)
        await ws.send(json.dumps({"type": "CloseStream"}))
        listener.cancel()

asyncio.run(transcribe())

const WebSocket = require("ws");
const fs = require("fs");

const API_KEY = "YOUR_API_KEY";
const AUDIO_FILE = "audio.wav";

const url = new URL("wss://api.telnyx.com/v2/speech-to-text/transcription");
url.searchParams.set("transcription_engine", "Deepgram");
url.searchParams.set("model", "nova-3");
url.searchParams.set("input_format", "wav");
url.searchParams.set("interim_results", "true");

const ws = new WebSocket(url.toString(), {
  headers: { Authorization: `Bearer ${API_KEY}` },
});

ws.on("open", () => {
  const audio = fs.readFileSync(AUDIO_FILE);
  for (let i = 0; i < audio.length; i += 4096) {
    ws.send(audio.slice(i, i + 4096));
  }
  setTimeout(() => {
    ws.send(JSON.stringify({ type: "CloseStream" }));
    ws.close();
  }, 3000);
});

ws.on("message", (data) => {
  const msg = JSON.parse(data);
  const prefix = msg.is_final ? "FINAL" : "partial";
  console.log(`[${prefix}] ${msg.transcript || ""}`);
});

ws.on("error", (err) => console.error("Error:", err.message));