Adaptive Multi-Rate (AMR) is an audio format optimized for speech coding, commonly used in mobile phone voice recordings.
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 AMR when your priority is mobile voice recordings, speech audio — 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 AMR and CAF formats in our detailed guide.
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AMR (AMR audio) - Adaptive Multi-Rate, compressed speech codec. Best for mobile voice recordings, speech audio.
CAF (CAF audio) - Core Audio Format, Apple's professional audio format. Ideal for apple audio production, professional editing.
Yes, GoConvertFile offers free conversion of AMR to CAF for files up to 100MB. No registration required.
Most AMR 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 AMR to CAF does not cause additional quality loss — CAF uses lossless compression. However, any artifacts already present in the original AMR file will persist in the CAF output.
CAF files are typically 2-5x larger than equivalent AMR files because CAF preserves all pixel data. This is expected and necessary for lossless quality.