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MMF Converter – Legacy Mobile Ringtone Files

Convert MMF ringtones to MP3, WAV and more. Play legacy mobile audio anywhere.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format

Step 3: Convert files

Read Terms of use before using

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format

Step 3: Convert files

Read Terms of use before using

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What is MMF?

MMF (SMAF - Synthetic Music Mobile Application Format) is a ringtone format developed by Yamaha for older mobile phones. Popular in the early 2000s, MMF files contained synthesized music and simple audio for feature phones.

MMF was commonly used on Sony Ericsson, Samsung, and other pre-smartphone devices. Modern phones no longer use this format, but you may have old ringtone collections in MMF format.

Why Convert MMF Files?

MMF is a legacy format with limited support:

No modern device support – Smartphones do not play MMF
Archive old ringtones – Convert to MP3 for preservation
Use on new phones – Convert to compatible formats
Edit and modify – Convert to WAV for audio editing

Convert MMF to Other Formats

MMF to MP3

Convert legacy ringtones to universally playable format. MP3 works on all modern devices and preserves your old ringtone collection.

MMF to WAV

Uncompressed audio for editing or archiving. WAV provides the most flexibility for working with the audio.

MMF to M4A

Convert for Apple devices. M4A works seamlessly with iPhone and iTunes.

MMF to M4R

Transform old ringtones for iPhone use. Create iOS-compatible ringtones from your MMF collection.

MMF Technical Information

Full name: Synthetic Music Mobile Application Format (SMAF)
Developer: Yamaha Corporation
File extension: .mmf
Audio type: Synthesized MIDI-like audio or sampled audio
Era: Early 2000s feature phones
Status: Legacy/obsolete format

MMF History

MMF was part of the polyphonic ringtone era when phones transitioned from monophonic beeps to multi-voice synthesized music. Yamaha's SMAF technology allowed phones with limited memory and processing power to play complex melodies.

As smartphones emerged with full audio playback capability, MMF became obsolete. MP3 and AAC replaced synthesized formats entirely.

How to Convert MMF Files

Upload your MMF file – Select your legacy ringtone
Choose output format – MP3, WAV, M4A, and more
Download converted file – Play on any modern device

Works on Any Device

Convert MMF files in your browser:

Windows, Mac, Linux, Chromebook
Chrome, Firefox, Safari, Edge
iPhone, iPad, Android

Pro Tip

If you have a collection of MMF ringtones with sentimental value, batch convert them to MP3 now while converters still support the format. Legacy formats may lose support over time.

Common Mistake

Expecting high-fidelity audio from MMF files. These were designed for phones with tiny speakers and limited capabilities. Quality was never high to begin with.

Best For

Recovering and preserving old ringtone collections from feature phone era. Converting legacy mobile audio for use on modern smartphones.

Not Recommended

Do not use MMF for new audio projects. The format is obsolete with no practical advantages. Use MP3, AAC, or other modern formats.

Frequently Asked Questions

MMF (SMAF) is a legacy ringtone format created by Yamaha for older mobile phones. It was popular in the early 2000s on feature phones before smartphones.

Modern smartphones (iPhone, Android) do not support MMF playback. Convert MMF to MP3 or M4A for use on current devices.

Most media players cannot open MMF. Convert to MP3 or WAV first. Some specialized audio tools may still support MMF playback.

Similar concept but different format. Both use synthesized audio, but MMF (SMAF) was specifically designed for mobile phones with proprietary Yamaha specifications.

You likely downloaded ringtones for an older mobile phone. MMF was commonly used on Sony Ericsson, Samsung, and other feature phones in the 2000s.

Yes. Convert MMF to M4R format for iPhone ringtones. The audio will be extracted and converted to Apple's ringtone format.

The audio content is preserved. Quality depends on the original MMF file, which was typically low-fidelity due to mobile phone limitations of that era.

No. MMF is obsolete. Modern phones use MP3, AAC, and other standard audio formats for ringtones and audio playback.

MMF Conversions & Related Converters

Quick access to the most commonly used file conversions.