AudioLetter

Overview

AudioLetter transforms written newsletters and articles into professional audio content, enabling creators and publishers to reach subscribers who prefer listening over reading. This AI-powered audio conversion agent uses advanced text-to-speech technology combined with intelligent content preprocessing to generate naturally flowing audio narrations. By automatically distributing audio files via email automation and Telegram notifications, AudioLetter helps newsletter writers expand their audience reach and create podcast-style content from existing written material without manual production work.

How It Works

1. Pre-process Newsletter Content (Claude AI) — Analyzes the newsletter text to optimize it for audio delivery. Removes URLs, converts markdown formatting into natural speech patterns, adds pause cues, and generates an engaging audio introduction for seamless listening experience.

2. Select Narration Voice (ElevenLabs) — Retrieves available professional voices from the ElevenLabs voice library, with optional filtering to use a saved custom voice clone that matches your brand identity.

3. Generate Audio Narration (ElevenLabs) — Synthesizes the full preprocessed newsletter text into high-quality audio using advanced text-to-speech technology with optimized stability and voice similarity settings for natural-sounding results.

4. Draft Delivery Copy (Claude AI) — Generates compelling email subject lines and audio edition descriptions to maximize subscriber engagement and encourage listening.

5. Deliver Audio by Email (Gmail) — Sends the completed audio file to subscribers as an attachment or with a direct listening link using your authenticated Gmail account, supporting both plain text and HTML email formats.

6. Deliver Audio via Telegram (Telegram API) — Distributes the audio file to your Telegram channel or community groups, enabling members to access content on their preferred platform.

7. Log Episode Metadata (Notion) — Creates a database record documenting the audio episode, including source newsletter title, selected voice, audio duration, and all delivery channels used for future reference and analytics.

Key Features

• One-Click Audio Conversion — Transforms newsletter text into professional audio narration in minutes with minimal manual intervention required
• Multi-Channel Distribution — Automatically delivers audio to subscribers via email and Telegram, maximizing reach across preferred listening platforms
• Custom Voice Selection — Choose from ElevenLabs' professional voice library or use your own custom voice clone for consistent brand audio identity
• Intelligent Content Preprocessing — Removes URLs, optimizes formatting, and adds natural speech cues to ensure audio reads naturally without awkward pauses or formatting artifacts
• Complete Audit Trail — Automatically logs all audio episodes in Notion with duration, voice used, and distribution channels for analytics and content management

Use Cases

• Newsletter Writers Expanding Audience — Publishers seeking to offer audio versions to busy subscribers who consume content during commutes, workouts, or multitasking moments
• Podcast-Style Content Creation — Bloggers and creators repurposing written articles into audio format to launch podcast feeds without dedicated recording equipment or production knowledge
• Accessibility-First Publishing — Content creators ensuring their newsletters reach visually impaired subscribers and those who prefer audio consumption through automated audio narration
• Community Engagement — Newsletter publishers delivering exclusive audio editions to Telegram communities or subscriber groups, increasing time-on-platform and engagement metrics