Apple II
File Type Notes
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                                                  Developer Technical Support


File Type:         $D7 (215)
Auxiliary Type:    All

Full Name:     MIDI file
Short Name:    MIDI data

Written by:    Matt Deatherage                                  January 1990

Files of this type and auxiliary type contain data for a Musical Instrument 
Digital Interface (MIDI) peripheral.
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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
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        $0000           MIDI  standard data           IMA
        $8001           Master Tracks Pro SysEx file  PassPort 
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                     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.
