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File Formats and Audio Guidance

Steven Dunn edited this page Mar 1, 2026 · 1 revision

File Formats and Audio Guidance

Technical details to ensure your audiobook sounds professional.

📏 Character Limits

Crucial: The AI engine performs best with short text blocks.

  • Limit: 500 characters per segment.
  • Auto-Fix: The application will automatically split longer sentences at logical break points (commas, periods) during text analysis.
  • Warning: Segments exceeding 500 characters may cause the generation to sound distorted or cut off.

🎵 Supported Formats

  • Input Text: .txt (UTF-8) is recommended.
  • Input Audio: .wav, .mp3, .m4a, .ogg, .flac. (.wav is preferred for cloning).
  • Internal Processing: .wav (44.1kHz or 48kHz).
  • Final Output: .m4b (AAC encoding, 64kbps default).

🎚️ Audio Quality Tips

  • Bitrate: Final audiobooks are encoded at 64kbps Mono by default, which is standard for high-quality voice audio.
  • Normalization: The system attempts to normalize loudness across chapters during the final Assembly process.

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