The MIDI Mapper's standard patch services provide device-independent MIDI file playback for applications. You don't need to understand exactly how the MIDI Mapper works to use these services. The MIDI Mapper can be used with the MCI MIDI sequencer or with low-level MIDI output services.
To learn more about the MIDI Mapper or about authoring standard MIDI files for Windows, read this section to become familiar with how the MIDI Mapper works. For specific information on how to use the MIDI Mapper, see “Using the MIDI Mapper with the MCI Sequencer,” earlier in this chapter, or see Chapter 80, “Low-Level Audio.”