Digital & Interactive Media
Digital Audio Editing
Copyright © Texas Education Agency, 2013. All rights reserved.
1
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.
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: Digital and Interactive Media – Digital Audio Editing
2
Digital Audio

Analog Sound
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.
IT: Digital and Interactive Media – Digital Audio Editing
3
Digital Audio

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.
IT: Digital and Interactive Media – Digital Audio Editing
4
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.

Make sure the microphone is
connected to the microphone
input on your computer.
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: Digital and Interactive Media – Digital Audio Editing
5
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.
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: Digital and Interactive Media – Digital Audio Editing
6
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?
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: Digital and Interactive Media – Digital Audio Editing
7
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.
IT: Digital and Interactive Media – Digital Audio Editing
8
Podcasting
•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.
IT: Digital and Interactive Media – Digital Audio Editing
9
•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.
IT: Digital and Interactive Media – Digital Audio Editing
10
Podcast Channel
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
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: Digital and Interactive Media – Digital Audio Editing
11
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.
Copyright © Texas Education Agency, 2013. All rights reserved.
IT: Digital and Interactive Media – Digital Audio Editing
12