Hi crazygirl,
welcome to the PowerPoint Forum.

Do you mean how it is possible to play music in PowerPoint when you start your presentation?

To play music in your PowerPoint presentation you must first insert or embed music into your PPT file.

You can do this with PowerPoint's inbuilt controls and options, but these are very limited and PowerPoint doesn't offer you any control over audio in PowerPoint, only the ability to play or stop sound.

With The 123PPT Music & SoundFX Studio you can create playlists for your presentations and assign individual playlists on each slide of your presentation, on single slides or create one to play throughout your entire presentation.

With the 123PPT Music & SoundFX Studio there is no limit to the number of tracks you can add to your playlist or to the length of each track you want to play.

The 123PPT Music & SoundFX Studio also has a range of audio controls which gives you complete control over your sound in PowerPoint. For example, volume, fade in, fade out, cross fade and pan.

You can even record your own voice and narrate your slides inside PowerPoint.

For more details about the 123PPT Music & SoundFX Studio please look at The 123PPT Music & SoundFX Studio for PowerPoint.

The 123PPT Music & SoundFX Studio is fully compatible with PowerPoint 2003, PowerPoint 2007 and PowerPoint 2010.