![]() ![]() MIDI FilterĪ MIDI filter is implemented as a port/miniport driver pair. ![]() For example, a pure MPU-401 device performs output and capture but not synthesis. The filter outputs a MIDI stream consisting of time-stamped MIDI events.Ī single MIDI or DirectMusic filter can perform a combination of the three functions-synthesis, output, and capture-depending on the capabilities of the device that the filter represents. The filter outputs raw MIDI messages to an external MIDI sound module.Ī MIDI or DirectMusic capture filter takes as input a series of raw MIDI messages from a MIDI keyboard or other external MIDI device. ![]() The filter outputs either of the following:Īnalog audio signals that can drive a set of speakersĪ MIDI or DirectMusic output filter receives as input a MIDI stream consisting of time-stamped MIDI events. For more information about these interfaces, see the Microsoft Windows SDK documentation.Ī MIDI or DirectMusic synthesizer filter receives as input a MIDI stream consisting of time-stamped MIDI events. Applications typically access the capabilities of these devices either through the DirectMusic API or through the Microsoft Windows Multimedia midiOut Xxx and midiIn Xxx functions. MIDI and DirectMusic filters represent devices that synthesize, output, or capture MIDI music data. ![]()
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