Editing DirectMusic (section)

== Details ==
DirectMusic provides a complete system for implementing ''dynamic soundtracks'' that take advantage of [[hardware acceleration]], [[Downloadable Sounds]] (DLS), [[DirectX Media Objects]] (DMOs), advanced 3D positioning effects and several other features. DirectMusic provides composition and playback of dynamic musical soundtracks based on stored compositional material. Rather than a static playback, the music is generated on the fly, and is played with variations, and can respond to flexible program events. Using DirectMusic, it is possible to:

* Load and play sounds from files or resources in [[MIDI]], [[WAV]], or DirectMusic Producer run-time format. The small file size of DirectMusic soundtracks makes it very well suited for Web applications.
* Schedule the timing of musical events with high precision. DirectMusic allows timestamping of MIDI input data at the moment of arrival to a system wide reference clock. Music or sound effects composed for DirectMusic can be very flexible and can change dynamically over time or in response to a user event. DirectMusic addresses the problems of Windows' legacy ''MidiOut'' [[API]], which has shaky timing and limited real-time control.
* Play from multiple sources simultaneously, each with separate timing and instrument sets.
* Send [[tempo]] changes, patch changes, and other [[MIDI]] events programmatically.
* Use Downloadable Sounds (DLS), an open standard by the [[MIDI Manufacturers Association]], allowing developers to output [[sample-based synthesis|'wavetable' sounds]] on audio hardware not equipped with '[[Table-lookup synthesis|wavetable]]' [[sample-based synthesis]].  The downloadable sounds can be extended to include new or customized instruments.
* On computers with sound card which lack '[[Table-lookup synthesis|wavetable]]' [[sample-based synthesis]], DirectSound's ''Software Synthesizer'' ensures that message-based music such as [[MIDI]] files and DirectMusic segments sound identical on all hardware configurations rather than playing differently on different computers with different sound cards. An application can also play an unlimited variety of instruments and even produce unique sounds for individual notes and velocities.
* Locate sounds in a 3D environment.
* Easily apply [[Pitch (music)|pitch]] changes, [[reverberation]], and other effects.
* Use more than 16 [[MIDI]] channels. DirectMusic makes it possible for any number of voices to be played simultaneously, up to the limits of the synthesizer.
* Play segments on different audio paths, so that effects or [[spatial music|spatialization]] can be applied individually to each sound.
* Capture MIDI data, or stream it from one port to another.
* '''DirectMusic Producer''' can be used to create sound files that take full advantage of DirectMusic's interactive features.
* Uses a portion of main memory as the buffer for sound card.<ref>https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ee416820%28v=vs.85%29</ref>
* Better [[Direct Memory Access|DMA]] method compared to VXD sound driver.<ref>https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ee416769(v=vs.85)</ref>

To ensure DirectMusic functions such as [[Microsoft GS Wavetable SW Synth]] work correctly, a [[Windows Driver Model|WDM]] sound driver is recommended.

On [[Windows Vista]], DirectMusic uses only [[software synthesizer|software synthesis]]. Also, the DirectMusic kernel mode synthesizer that supplies the DirectMusic components with a high-resolution timer has been removed.<ref>{{cite web | url=http://support.microsoft.com/kb/943253 |title=Timing jitter and clock drift when editing or playing MIDI in Windows Vista |website=Microsoft |date=December 4, 2007 |archive-url=https://web.archive.org/web/20071214031044/http://support.microsoft.com/kb/943253 |archive-date=December 14, 2007 |url-status=dead}}</ref>

[[Windows 10]] support [[computation offloading|hardware offloading]] of [[Sound effect (musical instruments)|sound effects]].<ref>{{cite web |url=https://learn.microsoft.com/en-us/windows-hardware/drivers/audio/windows-threshold--what-s-new-for-audio |title=Windows 10: What's New for Audio Drivers |website=Microsoft |date=December 15, 2021}}</ref><ref>{{cite web |url=https://learn.microsoft.com/en-us/windows-hardware/drivers/audio/audio-processing-object-architecture |title=Audio Processing Object Architecture |date=December 13, 2024 |website=Microsoft}}</ref>