1. Copyright © Texas Education Agency, 2013. All rights reserved.1 Digital & Interactive Media Digital Audio Editing

2. Digital Audio Sound: Sound is simply waves of compressed air that move out from its source—similar to dropping a stone in water. Your ears are sensitive to these compressed waves. As the sound waves interact with your eardrum, the signal is sent to your brain, which converts them to the sounds that you recognize. 2IT: Digital and Interactive Media – Digital Audio EditingCopyright © Texas Education Agency, 2013. All rights reserved.

3. Digital Audio Analog Sound IT: Digital and Interactive Media – Digital Audio Editing3 Analog sound is recorded by using some property of the original sound to reproduce the signal. Often when analog sound is recorded, external interference called noise can get recorded each time the sound is re-recorded, resulting in each generation of the recording losing quality. Copyright © Texas Education Agency, 2013. All rights reserved.

4. Digital Audio IT: Digital and Interactive Media – Digital Audio Editing4 Digital Sound Digital audio is sound that has been stored as numerical data and can be easily reproduced and manipulated. Digital sound can be reproduced numerous times without losing quality. Copyright © Texas Education Agency, 2013. All rights reserved.

5. Audio Equipment In addition to your computer, the only additional piece of hardware you will need is a microphone. A simple PC microphone will work. IT: Digital and Interactive Media – Digital Audio Editing5 Make sure the microphone is connected to the microphone input on your computer. Copyright © Texas Education Agency, 2013. All rights reserved.

6. Audio Equipment You will also need some recording and editing software for this lesson. There are several open-source audio editing applications that you can download for free. IT: Digital and Interactive Media – Digital Audio Editing6Copyright © Texas Education Agency, 2013. All rights reserved.

7. Podcasting Podcasting is media distributed over the internet via a syndicated download. Podcasts can be viewed on computers, MP3 players, or PDAs. Podcasts allow visitors to subscribe, automatically download audio clips, and listen to them offline. Do you know what company came up with the idea for podcasting? IT: Digital and Interactive Media – Digital Audio Editing7Copyright © Texas Education Agency, 2013. All rights reserved.

8. IT: Digital and Interactive Media – Digital Audio Editing8 How Podcasts Work Originally, broadcasts were made at specific times. You had to be available at that time to receive the broadcast. Copyright © Texas Education Agency, 2013. All rights reserved.

9. Podcasting IT: Digital and Interactive Media – Digital Audio Editing9 Podcasting utilizes a feature known as RSS (Really Simple Syndication). Used for content that is updated regularly. Requires you to use programs such as a reader to check for articles or a receiver to download podcasts. The reader/receiver automatically checks for updates. Copyright © Texas Education Agency, 2013. All rights reserved.

10. IT: Digital and Interactive Media – Digital Audio Editing10 Upload files to your server and update your RSS feed page. Subscribers automatically receive the updates to their devices. Copyright © Texas Education Agency, 2013. All rights reserved.

11. IT: Digital and Interactive Media – Digital Audio Editing11 The RSS feed, or RSS Channel, is a special page that contains all the podcasts and is recognized by readers and receivers. Visitors enter the URL of this page in their podcast receiver to subscribe. Available podcasts Podcast Channel Copyright © Texas Education Agency, 2013. All rights reserved.

12. Creating the Podcast To create your podcast: Record your podcast. Upload to your podcast server. Update your podcast channel. Your subscribers will automatically receive your new podcast on their receiver. IT: Digital and Interactive Media – Digital Audio Editing12Copyright © Texas Education Agency, 2013. All rights reserved.