Core Audio Format (CAF) is Apple's audio container designed to overcome the file size and sample rate limitations of AIFF and WAV.
Audible Audiobook, encrypted AAC audiobook format — stored as audio/x-aax — uses lossy encoding to handle audible audiobooks, digital spoken word. Typical file sizes: varies by content.
Reach for CAF when your priority is apple audio production, professional editing — its uncompromising quality ensures every detail is preserved.
Reach for AAX when your priority is audible audiobooks, digital spoken word — its efficient compression makes sharing fast and storage minimal.
Learn more about CAF and AAX formats in our detailed guide.
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.caf,.CAF (max 100MB)
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CAF (CAF audio) - Core Audio Format, Apple's professional audio format. Best for apple audio production, professional editing.
AAX (AAX) - Audible Audiobook, encrypted AAC audiobook format. Ideal for audible audiobooks, digital spoken word.
Yes, GoConvertFile offers free conversion of CAF to AAX for files up to 100MB. No registration required.
Most CAF to AAX conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
AAX is ideal for audible audiobooks, digital spoken word. Audible Audiobook, encrypted AAC audiobook format
Yes, converting CAF to AAX uses lossy compression, which reduces file size by discarding some visual data. Set quality to 85-95% for a good balance of quality and file size.
AAX files are typically 50-80% smaller than CAF files because AAX uses efficient lossy compression. The exact reduction depends on quality settings.