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Step 1. Insert the music in your PowerPoint presentation.
From the main menu Insert > Movies and Sounds > Sound from file
Then from the Files of Type drop down box select mp3 format.
You will then get a message about how you want the music to start.
Step2 - Setting the music to play across multiple slides
You do this using a feature called Custom Animation. Select your music file then Right click (not the usual left click) and select Custom Animation . You can do this by selecting Slide Show > Custom Animation
How you do this depends upon which version of PowerPoint you are using.
Then select Multimedia Settings afterwards and make sure that you have selected While Playing >Continue Slide show You will then need to set the Stop Playing button and enter in the Stop Playing > After number slides the number of slides that you would like the music to play for.
If you are using PowerPoint XP the procedure is slightly different
Custom Animation > Right Click on Media and select Effect Options
You will then need to set the Stop Playing button and enter in the Stop Playing > After number slides the number of slides that you would like the music to play for.
Step 4. How to embed music in your presentation
The last item in the process is that the music may not be embedded in your PowerPoint presentation. This means that is you save your presentation onto a CD or you are to email it, then the music may not automatically go across. It all depends upon the file size of the music.
If you want the music to be embedded in the presentation you will need
to follow a couple of steps.
1. Make sure your music is in WAV format (mp3 files can only be linked and not embedded)
2. Increase the value in the Link sounds with file size greater than box to a value greater than the file size of the MP3 file. For example if the file size is 4.5MB then you will need to include a value higher than 4500. A good general purpose size that should incorporate most song files is 6000 as most mp3 files are less than 6MB. Be careful as some classical music tracks could be longer than this.
The only downside is that the file size of the final file could be quite large.
There is a 50 Mb limit for embedding WAV files. For eample if you had two WAV files of 34 MB the you will be able to embed them, but it would make your file size over 68MB.
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