Soniox

export SONIOX_API_KEY=your_api_key

import { SonioxAudioTranscriptLoader } from "@soniox/langchain";
import { ChatOpenAI } from "@langchain/openai";
import { ChatPromptTemplate } from "@langchain/core/prompts";
import { StringOutputParser } from "@langchain/core/output_parsers";

const audioFileUrl = "https://soniox.com/media/examples/coffee_shop.mp3";
const loader = new SonioxAudioTranscriptLoader(
  {
    audio: audioFileUrl,
  },
  {
    language_hints: ["en"],
    // Any other transcription parameters you find here
    // https://soniox.com/docs/stt/api-reference/transcriptions/create_transcription
  }
);

console.log(`Transcribing ${audioFileUrl}...`);
const docs = await loader.load();

const transcriptText = docs[0].pageContent;
console.log(`Transcript: ${transcriptText}`);

// Create a chain to summarize the transcript
const prompt = ChatPromptTemplate.fromTemplate(
  "Write a concise summary of the following speech:\n\n{transcript}"
);

const chain = prompt
  .pipe(new ChatOpenAI({ model: "gpt-5-mini" }))
  .pipe(new StringOutputParser());

const summary = await chain.invoke({ transcript: transcriptText });
console.log(summary);

// Fetch the file
const response = await fetch("https://github.com/soniox/soniox_examples/raw/refs/heads/master/speech_to_text/assets/coffee_shop.mp3");
const audioBuffer = await response.bytes(); // Uint8Array

const loader = new SonioxAudioTranscriptLoader({
    audio: audioBuffer,
})

const docs = await loader.load();
console.log(docs[0].pageContent); // Transcribed text

const loader = new SonioxAudioTranscriptLoader(
  {
    audio: audioFileUrl,
  },
  {
    translation: {
      type: "one_way",
      target_language: "fr",
    },
    language_hints: ["en"],
  }
);

const docs = await loader.load();

let originalText = "";
let translatedText = "";

for (const token of docs[0].metadata.tokens) {
  if (token.translation_status === "translation") {
    translatedText += token.text;
  } else {
    originalText += token.text;
  }
}

console.log(originalText);
console.log(translatedText);

const loader = new SonioxAudioTranscriptLoader(
  {
    audio: audioFileUrl,
  },
  {
    language_hints: ["en", "es"],
  }
);

const docs = await loader.load();

const loader = new SonioxAudioTranscriptLoader(
  {
    audio: audioFileUrl,
  },
  {
    enable_speaker_diarization: true,
  }
);

const docs = await loader.load();

// Access speaker information in the metadata
let currentSpeaker = null;
let output = "";
for (const token of docs[0].metadata.tokens) {
  if (currentSpeaker !== token.speaker) {
    currentSpeaker = token.speaker;
    output += `\nSpeaker ${currentSpeaker}: ${token.text.trimStart()}`;
  } else {
    output += token.text;
  }
}
console.log(output);

// Analyze the conversation
const prompt = ChatPromptTemplate.fromTemplate(
  `Analyze the following conversation between speakers.
Identify the intent of each speaker.

Conversation:
{conversation}`
);

const chain = prompt
  .pipe(new ChatOpenAI({ model: "gpt-5-mini" }))
  .pipe(new StringOutputParser());

const analysis = await chain.invoke({ conversation: output });
console.log(analysis);

const loader = new SonioxAudioTranscriptLoader(
  {
    audio: audioFileUrl,
  },
  {
    enable_language_identification: true,
  }
);

const loader = new SonioxAudioTranscriptLoader(
  {
    audio: audioBuffer,
  },
  {
    context: {
      general: [
        { key: "industry", value: "healthcare" },
        { key: "meeting_type", value: "consultation" }
      ],
      terms: ["hypertension", "cardiology", "metformin"],
      translation_terms: [
        { source: "blood pressure", target: "presión arterial" },
        { source: "medication", target: "medicamento" }
      ]
    }
  }
);

type Document {
  pageContent: string, // The transcribed text
  metadata: SonioxTranscriptResponse // Full transcript with metadata
}

type SonioxTranscriptResponse = {
  id: string;
  text?: string | null;
  tokens?: SonioxTranscriptToken[] | null;
}

type SonioxTranscriptToken = {
  text: string;
  start_ms?: number | null;
  end_ms?: number | null;
  confidence?: number | null;
  speaker?: number | string | null;
  language?: string | null;
  translation_status?: string | null;
};