.MMF File Extension

Synthetic Music Mobile Application File

Developer Yamaha
2.6  |  14 Votes

What is an MMF file?

An MMF file is an audio file saved in the Yamaha Synthetic Music Mobile Application File (SMAF) format. MMF files commonly contain cell phone ringtones. Many mobile phones produced between 1999 and 2005 can play ringtones saved as MMF files.

More Information

In 1999, Yamaha introduced the SMAF sound format. This format was designed for use with the MA-1 sound chip, which was included in several mobile phones. Successive versions of the MA-1 chip, named MA-2, MA-3, MA-5, and MA-7, were included in more mobile phones, produced by LG, Motorola, Samsung, Panasonic, and other companies.

All MA-# chips can play audio saved in the SMAF format. Most of these SMAF audio files use the .mmf extension. (Some instead use the .mld extension). Users create MMF files by importing .WAV or .MID audio into Yamaha SMAF Tools and converting it to the SMAF format.

NOTE: Some MMF files also include graphics, which can be shown on a mobile phone.

How to open an MMF file

While the official tools used to create and play MMF files are discontinued, you can use VideoLAN VLC media player (multiplatform) to play the audio an MMF file contains. (You may have to right-click your MMF file and select Open with... to open it with VLC media player.)

How to convert an MMF file

You can use VideoLAN VLC media player to convert MMF files to the following audio formats:

  • .MP3 - MP3 Audio
  • .OGG - Ogg Vorbis Audio
  • .FLAC - Free Lossless Audio Codec
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Programs that open MMF files

Yamaha MidRadio Player  —  Discontinued
Yamaha MidRadio Player  —  Discontinued

Meal-Master Recipe File

Developer Episoft Systems
2.9  |  7 Votes

Recipe saved in the Meal-Master format, a standard recipe format supported by several different recipe programs; stores recipe ingredients and related information in a plain text format.

More Information

Many recipe programs allow you to export recipes as MMF files using the File → Export option. The resulting MMF file can then be opened in another application that supports the MMF format.

To import an MMF file in MacGourmet, follow these steps:

  1. Open the MacGourmet application.
  2. Select File → Import...
  3. Select "Meal-Master" from the Format drop down menu.
  4. Select your MMF file from its saved location and click Import.

NOTE: The Meal-Master format was first used by Meal-Master, a DOS-based recipe creation program.

Programs that open MMF files


Microsoft Message File

Developer Microsoft
2.5  |  2 Votes

Mail message format used by the Windows NT Mail client; contains a collection of e-mail messages created or received with Windows NT Mail; located in the "C:\Winnt35\" directory and named "[username].mmf" by default.

More Information

NOTE: Outlook Express is not designed to read MMF files. However, you can import them into Microsoft Exchange as a Personal Information Store (.PST) files, then import the messages into Outlook Express.

Programs that open MMF files

Microsoft NT Mail

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