UNIT 9: SOUND EDITING
AUDIO DEVICES, FORMATS AND CODECS.
Elena Peña and Lucía Velasco
INDEX
• Audio Devices
 Headphones
 Loud speakers
 Sound Card
 Sound Ports
 Microphones
• Codecs
• Sound Formats
 Wav...
INTRODUCTION
In this presentation we are going to talk about sound
editing.
When you edit a sound you change its format, i...
Audio Devices
• Loudspeakers: They are
objects that are used to
transform electrical signals into
audible signal.
• Headph...
CODECS
Lossy codecs
• It is a method that compresses
the information or data by
losing some of it.
Lossless codecs
• It is...
Sound Formats
• WAV (Waveform audio file format): It belongs to Mac X OS and
therefore Apple owns it.
• MIDI (Musical inst...
Codecs: www.wikipedia.com The information has been facilizate by Microsoft.
25.Mar.2014.
Lossless Codecs: www.wikipedia.co...
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U9 p2-elena and lucía.doc

  1. 1. UNIT 9: SOUND EDITING AUDIO DEVICES, FORMATS AND CODECS. Elena Peña and Lucía Velasco
  2. 2. INDEX • Audio Devices  Headphones  Loud speakers  Sound Card  Sound Ports  Microphones • Codecs • Sound Formats  Wav  Midi  Mp3  Aiff  Cda  Wma  Aup
  3. 3. INTRODUCTION In this presentation we are going to talk about sound editing. When you edit a sound you change its format, its length etc. First, we want to describe some audio devices in order to let you know your options. Then, we are going to write about codecs, loss codecs and lossless codecs. Finally, about the sound formats so as to show you to which formats you can transform your sounds.
  4. 4. Audio Devices • Loudspeakers: They are objects that are used to transform electrical signals into audible signal. • Headphones: They are a pair of small loudspeakers that are designed to be held in place close to a user's ears. • Microphones: They are devices used to transform sound found in the air into electrical signals. • Sound Cards: They are an expansion card that forms part of the computer. Its mission is to facilitate the input and output of audio signals to/from the computer controlled by the computer programs. • Sound Ports: They are the slabs located in the computer that are used to connect audio devices to the machine. They are objects that we use in order to reproduce sound
  5. 5. CODECS Lossy codecs • It is a method that compresses the information or data by losing some of it. Lossless codecs • It is a method that allows the data or information to be compressed without having to lose part of it. It is a device or computer program. Its function is to encode and decode digital data streams or signals.
  6. 6. Sound Formats • WAV (Waveform audio file format): It belongs to Mac X OS and therefore Apple owns it. • MIDI (Musical instrument digital interface): It belongs to Windows OS and because of that it is Microsoft. • MP3 (Audio player 3): Do not belong neither to a single OS nor to a brand. It can be used by any OS and therefore by any brand. • Aiff (audio interchange file format): It belongs to Mac X OS and it is from Apple. • Cda: It was created by Microsoft and Windows is the OS it uses. • Wma(windows media audio) : As its name shows it was created by Microsoft and Windows is its OS. • Aup: It was created as an extension of the Audacity Audio Software and it can be used with Linux, Windows and Mac OS X
  7. 7. Codecs: www.wikipedia.com The information has been facilizate by Microsoft. 25.Mar.2014. Lossless Codecs: www.wikipedia.com 25.Mar.2014. Lossy Codecs:www.wikipedia.com. 25.Mar.2014. Sound Cards: www.wikipedia.com 25.Mar.2014. Loudspeaker: www.wikipedia.com.25.Mar.2014. Headphones: www.wikipedia.com.25.Mar.2014. *The rest of the information is from pages that do not offer too much about the relative topics and that is why we have not written the links. Other definitions are invented from what we have learnt. WEBGRAPHY
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