Audiobook Studio 1.x docsFile Formats and Audio Guidance
A short reference for text limits, supported files and audio quality.
At a glance
- Keep each segment under 500 characters.
- Text in:
.txt. Voice samples:.wavpreferred. - Audiobook out:
.m4b, 64 kbps.
Character limit
The voice engine works best on short text. The limit is 500 characters per segment. The app splits longer sentences at commas and periods when it analyzes your text. Longer segments can sound distorted or cut off.
Supported formats
| Use | Format |
|---|---|
| Chapter text | .txt (UTF-8 recommended) |
| Voice samples | .wav, .mp3, .m4a, .ogg, .flac (.wav preferred) |
| Working audio | .wav (44.1 kHz or 48 kHz) |
| Finished audiobook | .m4b (AAC, 64 kbps default) |
Audio quality
- Bitrate: 64 kbps mono is the default and is standard for voice.
- Loudness: the app tries to level volume across chapters when you assemble.