File Type $D7 (215)
All Auxiliary Types

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.


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.


This and all of the other Apple II Technical Notes have been converted to HTML by Aaron Heiss as a public service to the Apple II community, with permission by Apple Computer, Inc. Any and all trademarks, registered and otherwise, are properties of their owners.