1. The document defines audio as sound heard on a recording or broadcast, such as music, radio news, public service announcements, speeches, and more. 2. Audio information refers to audio that conveys some type of message or information, such as music, radio news, public service announcements, radio commercials, radio dramas, and podcasts. 3. The document discusses common audio file formats, distinguishing between lossless formats like WAV and FLAC that preserve original quality, and lossy formats like MP3 and AAC that compress files to save space with minimal quality loss.

1. Audio Information
and Media
Christian Lloyd L. Sab

3. Can you describe your experience of watching
something without an audio?

4. How can you define Audio?

5. Audio
• An audio is a sound heard on a recording or broadcast. Sound
effects, music, songs, newscast, public service announcements,
speeches, and the like are all examples of audio,

6. Audio information
• If an audio bears an information, it becomes an audio information.
Below are some popular examples of audio information.
1. Music
2. Radio Newscasts
3. Public service announcements (PSAs)
4. Radio commercials
5. Radio dramas
6. Podcast

7. Music
• Songs or rhythms that primarily aim to entertain; usually aired on
the radio, streamed on the internet, or bought in record bars or
digital music stores.

8. Radio Newscasts
• News clips or articles delivered by radio journalist.

9. Public service announcements (PSAs)
• Messages disseminated by radios without charge that aim to raise
people’s awareness regarding a certain social issue.

10. Radio Commercials
• Paid advertisements that intend to promote a service or product

11. Radio dramas
• Similar to a television soap opera, these are purely acoustic
programs broadcasted on radio.

12. Podcast
• Digital audio programs that can be streamed or downloaded
through the internet.

13. File formats of audio
•Lossless
•Lossy

14. Lossless Format
• Keeps the audio quality of the original source. Example format:
WAV, AIFF, FLAC, APE, and apple Lossless.

15. Lossy
• Lossy compresses the file to save space without diminishing the
audio quality, such as MP3 (MPEG Audio Layer III), AAC, WMA, and
Ogg Vorbis.

18. MP3 (MPEG Audio File Format)
• a common format for consumer audio, as well as a standard of
digital audio compression for the transfer and playback of music
on most digital audio players.

20. M4A/AAC (MPEG-4 Audio/ Advance Audio
Coding)
• an audio coding standard for lossy digital audio compression.

21. WAV
• a Microsoft audio file format standard for storing an audio
bitstream on PCs.