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Modems unplugged - sound representation

All data on computers is stored and transmitted using the binary number system. When the binary digits need to be sent over the phone lines (which often happens in home internet connections), the digits are converted to sound and decoded at the other end using a modem. This activity uses audio coding similar...

Scratch Music Machine

Music Machine is designed as a simple introductory program for children aged 7-8. Students create four simple buttons which play different sounds when they are clicked with the left mouse button.

If they have time, they can create their own extra buttons. Computer science concepts include using a mouse click...

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