MIT researchers have developed a computer system that independently adds realistic sounds to silent videos. Although the technology is nascent, it’s a step toward automating sound effects for ...

3. How do I record… To get sound into Audacity, you can use your computer’s microphone and press the red record button. This makes the program work like an old-fashioned tape recorder.

LabChrip is a free sound effect generator software for Windows, for creating sound effects for games, music, videos, etc. Download it free.

And sound effects are actually downright pleasant. The Apple iPhone ringtones and general noises make for a pretty great a cappella medley. But our favorite might be their PlayStation video.