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Recording high-quality audiobooks for ACX requires careful attention to technical specifications. Ensuring your recordings meet ACX’s standards is essential for approval and a smooth publishing process. This guide will walk you through the key adjustments needed in your recording settings.
Understanding ACX’s Technical Specifications
Before making adjustments, familiarize yourself with ACX’s requirements. They specify standards for audio format, bit rate, sample rate, and noise levels. Meeting these standards ensures your audiobook is professional and acceptable for distribution.
Key Recording Settings to Adjust
1. Audio Format
ACX requires files in MP3 format. When exporting your recordings, choose MP3 with a constant bit rate of 192 kbps or higher for optimal quality.
2. Sample Rate
Set your recording software to a sample rate of 44,100 Hz (44.1 kHz). This is the standard for professional audio and meets ACX’s specifications.
3. Bit Depth and Noise Floor
Use a bit depth of 16 bits and ensure your recordings have a noise floor below -60 dB. Minimize background noise during recording to meet ACX’s quality standards.
Adjusting Your Recording Settings
In Audacity
Open Audacity and go to Edit > Preferences. Under the Quality tab, set the Default Sample Rate to 44100 Hz. When exporting, choose MP3 format with a bit rate of 192 kbps or higher.
In Adobe Audition
Navigate to Edit > Preferences > Audio Hardware to confirm the sample rate is 44,100 Hz. When exporting, select MP3 and set the bit rate to 192 kbps or above.
Final Tips for Meeting ACX Standards
- Use a pop filter to reduce plosive sounds.
- Record in a quiet, acoustically treated space.
- Monitor your audio levels to avoid clipping or distortion.
- Trim silence and background noise before finalizing your files.
By carefully adjusting your recording settings and following ACX’s specifications, you can produce professional-quality audiobooks that meet distribution standards. Consistent quality control ensures a smooth approval process and a better listening experience for your audience.