Powerpoint

For St Mary's Monday 10th May

media type="youtube" key="Mod0TBAd2Lg" height="385" width="480"

Adding sound

Free sound files at [|Find Sounds] MP3 is Audio MP4 is Audio,video,text. MP3 is an audio-specific format. The compression removes certain parts of sound that are outside the normal human hearing range so cannot be heard by the listener. It provides a representation of pulse-code modulation — encoded audio in much less space than straightforward methods, by using psychoacoustic models to discard components less audible to human hearing, and recording the remaining information in an efficient manner. Similar principles are used by JPEG, an image compression format.

MP4 It is most commonly used to store digital audio and digital video streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often referred to simply as MP4.

Though a WAV file can hold [|compressed] audio, the most common WAV format contains uncompressed audio in the [|linear pulse code modulation] (LPCM) format. Uncompressed WAV files are quite large in size, so, as [|file sharing] over the [|Internet] has become popular, the WAV format has declined in popularity

media type="youtube" key="6W2-IEQK9SY" height="385" width="640" Burning a CD using Windows Media Player