Audio

Question 1

What are the three groups of Audio File Formats?

Answer 1

TOP THREE:
Uncompressed (WAV)
Lossless Compression Format - lossless WMA (Windows Media Audio)
Lossy Compression

i.e. MP3
i.e. lossy WMA (Windows Media Audio)
i.e. AAC
i.e. Vorbis

Question 2

How to calculate audio file size?

Answer 2

sample rate x sample size x time (in seconds) x channels

Question 3

What is background music used for?

Answer 3

For tourism

Question 4

What is the creation of sound dependent on?

Answer 4

No. of Channels used, Sample Rate, Sample Size

Question 5

Method used to digitalise sound?

Answer 5

Sampling - also can be referred to as capturing audio

Question 6

Sampling rate (vertical)

Answer 6

No. of times a sample is taken from a sound wave
No. of samples per second
Higher sampling rate => Better Quality of Sound => Higher File Size

Question 7

Common sampling rates?

Answer 7

44.1 kHz (44100 samples per second)
22.05 kHz (22050 samples per second)

Question 8

Channels meaning

Answer 8

A ‘channel’ is one separate stream of audio information

Question 9

Audio file formats listed:

Answer 9

WAV (Waveform Audio File Format) - is an audio file format standard

AIFF (Audio Interchange File Format) - Audio File Format for Apple Macintosh computer systems

MP3 (MPEG-1 Audio Layer 3)

WMA (Windows Media Audio) - MICROSOFT

MIDI (Musical Instrument Digital Interface)

AAC (Advanced Audio Coding) - garage band