Files of this type and auxiliary type contain data for a Musical Instrument Digital Interface (MIDI) peripheral.
Files of type $D7 contain data that conforms to the MIDI standard as defined by the International MIDI Association. All data contained in files of this type must follow that standard.
Although absolutely anything MIDI can fit in a standard MIDI file, developers may wish to store peripheral-specific or system-specific information in a file with a different auxiliary type for easier manipulation of the data. For example, if you were to write a program to control a Matthew IOP-1 Fabulo-Synth, you might wish to store the MIDI System Exclusive (SysEx) messages in a file with a distinctive auxiliary type. In doing so, not only could you find the information to control the Fabulo-Synth more quickly and conveniently, but other applications could also know not to even waste time presenting the file to their users for use on other peripherals. This capability is obviously not desirable to all creators of MIDI applications; however, Apple assigns auxiliary types to allow you the choice.
The following auxiliary type assignments are current for this file type as of the publication date of this Note:
Auxiliary Type Short Name Developer _____________________________________________________________ $0000 MIDI standard data IMA $8001 Master Tracks Pro SysEx file PassPort _____________________________________________________________ Table 1 - Auxiliary Type Assignments
The auxiliary types for this file type are reserved; any not listed in this Note or About File Type Notes must be assigned by Apple Computer, Inc. Using any file type or auxiliary type not assigned may result in conflicting identification of files by totally unrelated programs. To obtain an auxiliary type assignment in this file type, see About File Type Notes.
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