Microsoft Office Tutorials and References
In Depth Information
Getting Ready to Add Sound to a Slide
Getting Ready to Add Sound to a Slide
A sterile beep used to be the only sound you could get from your computer .
Nowadays, you can make your computer talk almost as well as the computers
in the Star Trek movies, or you can give your computer a sophomoric sense
of audible distaste. At last, the computer can be as obnoxious as the user!
Investigating sound files
Computer sounds are stored in sound files, which come in two basic varieties:
Audio files: Audio files contain digitized recordings of real sounds.
These sounds can be sound effects, such as cars screeching, guns firing,
or drums rolling; music; or even quotes from movies or your favorite TV
shows. (Imagine Darth Vader saying to your audience, “I find your lack
of faith disturbing.”)
Audio files come in two distinct varieties:
Uncompressed: This type of audio file (including the standard
Windows WAV format) provides pristine, clean sound (and packs
a large file size to prove it). Both Windows and PowerPoint come
with a collection of WAV files that provide simple sound effects
such as swooshes, blips, applause, and drum rolls.
Compressed: For longer sound clips, such as complete songs,
the popular formats to use include MP3 and WMA. MP3 is a
compressed format that’s popular for sounds obtained from the
Internet, and WMA is a newer audio format developed by Microsoft
for newer versions of Windows. You can tell the format of a
sound file by the filename’s extension (.mp3 or .wma). (There’s
an improved version of MP3 out called MP4, but it isn’t used
much yet). These files take up a lot less room, although any
resident audiophile may scoff at using them. Go ahead and use them
anyway — if it sounds right, go with it.
MIDI files: MIDI files contain music stored in a form that the sound
card’s synthesizer can play. Think of it like sheet music for your digital
piano player. Windows comes with several MIDI files, and you can
download many more from the Internet. MIDI files have the file extension .mid.
To insert a sound into a PowerPoint presentation, all you have to do is paste
one of these sound files into a slide. Then when you run the presentation in
Slide Show View, you can have the sounds play automatically during slide
transitions, or you can play them manually by clicking the Sound button.
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