mmf
What is a .mmf file?
application/vnd.smaf
MMF commonly denotes Yamaha's SMAF mobile-music format, a binary multimedia container used for ringtones and handset audio. It is organized as typed chunks that can carry score data, sampled wave data, graphics, and control information, with device-era encoding constraints unlike a general WAV or MIDI file.
How to use a .mmf file
Use an example .mmf file to test SMAF signature and chunk parsing, metadata and duration extraction, safe handling of an unsupported codec, and download-only behavior in browsers that cannot decode the format.