Audify - PDF to Audiobook

0226_1.5x.mp4

Audify is a SwiftUI application designed to convert PDF books into high-quality, professional-grade audiobooks using Google's Text-to-Speech (TTS) Chirp 3 HD voices. It also features a built-in Exa search to find and import PDF books directly from the web.

Setup Instructions

1. API Keys

You will need the following API keys and credentials:

• Exa API Key: Used for searching PDFs. Get one at exa.ai.
• OpenRouter API Key: Used for metadata extraction. Get one at openrouter.ai.
• Google Cloud TTS: This app uses Application Default Credentials (ADC) for authentication.

Configuring API Keys

Update the constants in app/Audify/Services/:

• ExaService.swift: Set apiKey for Exa.
• MetadataService.swift: Set apiKey for OpenRouter.
• ImageGenerationService.swift: Set apiKey (if using OpenAI/similar).

2. Google TTS Setup

To use the high-quality Chirp 3 HD voices, the app requires a google-credentials.json file.

1. Follow Google Cloud's Application Default Credentials (ADC) setup.
2. If using gcloud, run:

   gcloud auth application-default login

3. Copy your generated application_default_credentials.json from ~/.config/gcloud/ to app/Audify/google-credentials.json within the project.

3. Running in Xcode

1. Open app/Audify.xcodeproj in Xcode.
2. Select a simulator (e.g., iPhone 16) or a connected device.
3. Ensure your Team is selected in the Signing & Capabilities tab if running on a real device.
4. Build and Run (Cmd + R).

4. Connecting and Importing on Device

• Importing from Files: Tap the + button in the Library view and select "Add from Files" to import locally stored PDFs.
• Searching Web PDFs: Tap the + button, select "Search for PDF", and enter a search query. Preview the results and tap "Use PDF" to import.
• File Sharing: The app has UIFileSharingEnabled turned on. You can also transfer PDFs to the app via the Files app on your device by placing them in the Audify folder.

Troubleshooting

• Preview Failed (hostname not found): Some websites hosting PDFs may be blocked or unreachable in the simulator. Use the "Open in Safari" button to verify the link.
• TTS Errors: Ensure your Google Cloud Project has the Text-to-Speech API enabled and that your ADC credentials have the correct billing project/permissions.