Auto-transcribe WhatsApp voice messages to text

# Transcribe WhatsApp voice messages to text and reply via Evolution API

This workflow automates the processing of WhatsApp voice messages by instantly converting them into text and sending the transcription back to the chat. It’s ideal for businesses and support teams overwhelmed with audio messages and looking to understand content quickly without listening.

## Who it´s for
- Business owners receiving voice messages from clients on WhatsApp
- Support agents handling high volumes of audio inquiries daily
- Chat administrators aiming to automate initial voice message processing
- Teams needing faster filtering and response to incoming requests

## What the automation does
- Receives voice messages from WhatsApp via HTTP webhook
- Extracts sender info (number, name) and audio in base64 format
- Converts audio to binary file for processing
- Sends audio file to Groq API using Whisper for transcription
- Gets transcribed text and sends it back to the chat via Evolution API
- Quotes the original voice message when replying with text

## What´s included
- Ready-to-use n8n workflow
- Webhook and trigger logic
- Integrations with WhatsApp (via Evolution API), Groq API, and HTTP API
- Basic setup and adaptation instructions

## Requirements for setup
- n8n account (cloud or self-hosted)
- WhatsApp access via Evolution API (configured instance)
- API key from Groq for Whisper API access
- Ability to receive HTTP requests (public URL if using self-hosted n8n)

## Benefits and outcomes
- Saves time by eliminating manual audio playback
- Enables quick understanding of message intent
- Accelerates responses to complaints, orders, and queries
- Allows further text processing (search, analysis, CRM sync)
- Enhances professionalism with fast, accurate replies

## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via chat