Microsoft KB Archive/103217

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SAMPLE: Synchronizing Applications with CD Audio

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Q103217

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) 3.1

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SUMMARY
This technical article describes a simple technique that uses the Media Control Interface (MCI) to synchronize events in a Microsoft Windows-based application with audio from a CD. The following topics are covered:


 * MCI message interface
 * Audio CD time formats
 * Owner-draw graphical buttons
 * Extending the idea to other time sources

MORE INFORMATION
The following file is available for download from the Microsoft Download Center:

"Singacd.exe" For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base:

"Q119591 How to Obtain Microsoft Support Files from Online Services" Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file.

Four pieces of sample code included with this article create four applications: PLAYACD, a simple CD controller; SINGACD, a sing-along application that shows the lyrics to a CD as it plays; TIMEACD, an authoring tool to create the lyric files used by the sing-along application; and SINGAWAV, an application that demonstrates synchronizing to a waveform.

The SINGACD sample application shows how to use the media control interface (MCI) to synchronize an application with CD audio in Microsoft(R) Windows(TM).

SINGACD displays a moving ball above the lyrics of a song. The ball moves in time with the music and (ideally) stays above the current word in the song. Achieving this synchronization involves a two-part process: The first part involves displaying the entire line of text at the right time; the second part involves placing the ball over the correct word in the line.

SINGACD has the following components:


 * The PLAYACD application is a very simple controller for the MCI CD audio device.
 * The TIMEACD application is a tool for authoring lyric files.
 * The SINGAWAV sample is a modified version of SINGACD that opens and plays a specific wave file and lyric file.

Additional query words: kbfile softlib SINGACD.EXE

Keywords : kbfile kbmm kbsample kb16bitonly kbOSWin310

Issue type :

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310