Synthetic Music Mobile Application Format (MMF/SMAF) is a ringtone format for feature phones, supporting melody and audio playback.
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 MMF when your priority is mobile phone ringtones, legacy polyphonic 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 MMF and CAF formats in our detailed guide.
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MMF (MMF ringtones) - SMAF, Synthetic Mobile Audio Format for ringtones. Best for mobile phone ringtones, legacy polyphonic 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 MMF to CAF for files up to 100MB. No registration required.
Most MMF 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 MMF to CAF does not cause additional quality loss — CAF uses lossless compression. However, any artifacts already present in the original MMF file will persist in the CAF output.
CAF files are typically 2-5x larger than equivalent MMF files because CAF preserves all pixel data. This is expected and necessary for lossless quality.