Voice Notes Transcriber - Email Your Audio, Get Smart Transcriptions

This is a submission for the Postmark Challenge: Inbox Innovators.

What I Built

I built Voice Notes Transcriber, an AI-powered system that transforms voice memos sent via email into searchable, organized text notes.

Simply email an audio file to your Postmark inbound address, and the system automatically:

• 🎙️ Transcribes audio using Google Speech-to-Text API
• 🤖 Generates summaries and extracts action items with AI
• 🏷️ Auto-categorizes notes using NLP
• 🔍 Makes everything searchable
• 📊 Provides a beautiful dashboard to manage your notes
• 🔄 Optionally syncs to Notion

It solves the problem of voice notes being quick to create but hard to organize and search through later.

Demo

Live App: https://voice-notes.jugaad.digital/

Test Credentials:

• Email: [e-mail]
• Password: demo123

How to Test:

1. Login with test credentials
2. Send an audio file (MP3, WAV, M4A) to: [e-mail]
3. Wait ~30 (depending on duration) seconds for processing
4. See your transcribed note appear in the dashboard!

Screenshots

Dashboard View

Audio Player with Transcription

Email Processing Flow

Code Repository

giacomoverdi / voice-notes-transcriber

🎙️ Voice Notes Transcriber & Organizer

Un sistema intelligente che trascrive automaticamente le note vocali inviate via email utilizzando il parsing delle email in entrata di Postmark, l'API Google Speech-to-Text, e le organizza con categorizzazione basata su AI.

✨ Caratteristiche

Funzionalità Core

• 📧 Email-to-Transcription: Invia note vocali come allegati email per ottenere trascrizioni istantanee
• 🎯 Elaborazione AI: Trascrizione automatica usando Google Speech-to-Text
• 📝 Riassunti Intelligenti: Generazione di riassunti e estrazione di action items
• 🏷️ Auto-Categorizzazione: Categorizzazione intelligente basata sul contenuto
• 🔍 Ricerca Full-Text: Cerca attraverso trascrizioni, riassunti e metadati
• 📱 Dashboard Responsive: Interfaccia web elegante per gestire le note

Funzionalità Avanzate

• 🔄 Integrazione Notion: Sincronizza le note trascritte con il tuo workspace Notion
• 🎵 Riproduzione Audio: Player audio integrato con visualizzazione dell'onda
• 🌐 Supporto Multilingua: Trascrivi audio in più lingue
• 📊 Dashboard Analitica: Monitora pattern di utilizzo e insights
• 🔐…

View on GitHub

How I Built It

Tech Stack

• Backend: Node.js, Express, PostgreSQL, Redis
• Frontend: React, Vite, TailwindCSS
• AI/ML: Google Speech-to-Text API, Google Cloud AI
• Email: Postmark Inbound Email Parsing
• Storage: Google Cloud Storage (optional) or local
• Infrastructure: Docker, Docker Compose, Nginx

Postmark Implementation

The core feature uses Postmark's inbound email parsing webhook:

javascript
// Webhook endpoint that receives emails from Postmark
async handleInboundEmail(req, res) {
  const inboundEmail = req.body;

  // Validate webhook signature for security
  if (!postmarkService.validateWebhookSignature(req)) {
    return res.status(401).json({ error: 'Invalid signature' });
  }

  // Extract audio attachments
  const audioAttachments = inboundEmail.Attachments?.filter(att => 
    ['audio/mpeg', 'audio/wav', 'audio/mp4'].includes(att.ContentType)
  );

  // Process each audio file
  for (const attachment of audioAttachments) {
    // Decode base64 audio
    const audioBuffer = Buffer.from(attachment.Content, 'base64');

    // Save to Google Cloud Storage or local
    const audioUrl = await storageService.uploadAudio(audioBuffer);

    // Queue transcription job
    await transcriptionQueue.add({
      audioUrl,
      userId: user.id,
      emailSubject: inboundEmail.Subject
    });
  }

  // Send confirmation email
  await postmarkService.sendProcessingConfirmation(inboundEmail.From);
}

Comments

[Dotallio]

This is actually super useful for organizing all those scattered voice notes. Which use case do you see getting the most traction so far?