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.
Core Audio Format (CAF) is Apple's audio container designed to overcome the file size and sample rate limitations of AIFF and WAV.
Reach for AAX when your priority is audible audiobooks, digital spoken word — its efficient compression makes sharing fast and storage minimal.
Reach for CAF when your priority is apple audio production, professional editing — its uncompromising quality ensures every detail is preserved.
Learn more about AAX and CAF formats in our detailed guide.
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.aax,.AAX (max 100MB)
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AAX (AAX) - Audible Audiobook, encrypted AAC audiobook format. Best for audible audiobooks, digital spoken word.
CAF (CAF audio) - Core Audio Format, Apple's professional audio format. Ideal for apple audio production, professional editing.
Yes, GoConvertFile offers free conversion of AAX to CAF for files up to 100MB. No registration required.
Most AAX to CAF conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
CAF is ideal for apple audio production, professional editing. Core Audio Format, Apple's professional audio format
No, converting AAX to CAF does not cause additional quality loss — CAF uses lossless compression. However, any artifacts already present in the original AAX file will persist in the CAF output.
CAF files are typically 2-5x larger than equivalent AAX files because CAF preserves all pixel data. This is expected and necessary for lossless quality.