From a feature phone to Apple devices
Many people moved from a Samsung feature phone to an iPhone and left their sounds behind. M4A, AAC audio in an MP4 container, is the format Apple's apps understand best: the Music app, Files, iMessage, iMovie and GarageBand all open it. When you convert MMF to M4A, an old tone becomes a normal Apple audio file you can play, share or edit.
What the converter decodes
The converter handles the recorded audio in SMAF files: voice tones, sound effects and recorded music, usually stored as Yamaha 4-bit ADPCM. Melody ringtones made only of synthesizer note data have no recording to decode, and this tool cannot play the phone's synthesizer, so such files will not convert.
Settings
- Bitrate: 64 kbps mono is enough for 8–16 kHz tones; use 96 kbps for 22 kHz clips. Higher values only make the file larger.
- Channels: mono, matching the source.
- Sample rate: 44.1 kHz is the safe choice for Apple apps.
A 30-second tone at 64 kbps is about 240 KB, so even a large collection takes little space.
Naming and tags
M4A can store a title, artist and album, which the Music app shows in its lists. MMF files rarely contain any of this, so add the details yourself after import: the name of the tone and the phone it came from. It makes a collection of old sounds much easier to browse.
Other uses
To set an old tone as an iPhone ringtone, the file needs the M4R extension instead; use MMF to M4R. For a video slideshow of old phone photos with their original sounds, put the M4A into iMovie, or create a video directly with MMF to MP4. If the tone sounds harsh, a gentle cut of high frequencies in the equalizer can soften 4-bit noise.