SAMPLE: Synchronizing Applications with CD Audio

ID: Q103217

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) 3.1

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. Click the file name below to download the file:

Singacd.exe

For more information about how to download files from the Microsoft Download Center, please visit the Download Center at the following Web address

http://www.microsoft.com/downloads/search.asp

and then click How to use the Microsoft Download Center.

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 kbWinOS310 MMCDROM
Version : WINDOWS:3.1
Platform : WINDOWS
Issue type :