audio - sound waves and mono/stereo and surround sound

Question 1

forms of sound waves Analogue:

Answer 1

waves that are recorded in a format of continuous vibrations that are analogous to the original sound wave.
o Analog sound is visually represented as smooth waves that are similar to the original sound wave

Question 2

forms of sound waves Digital:

Answer 2

waves are represent the properties of the original sound as binary data contains the volume and frequency of the sound captured.
o Digital sound is recorded at a specified rate and are visually represented as jagged waves.

Question 3

properties to consider with sound volume

Answer 3

the loudness of the sound determined by the amplitude of the wave.
o Measured by decibels, larger amplitudes will lead to higher volumes and therefore louder sound.

Question 4

properties to consider with sound frequency

Answer 4

The amount of waves that pass a specified point per second and the determinant of the pitch of the sound. Measured by hertz, higher frequencies will lead to higher pitched sound while lower frequencies will lead to lower pitched sound.

Question 5

mono/stereo/ surround sound - forms of sound waves

Answer 5

Sound mixing is the blending of different aspects of audio into a single track.
o Depending on the number of channels used for mixing, we can achieve mono, stereo

Question 6

Mono sound:

Answer 6

Sound mixed into one channel to allow all speakers to play the same signals
and all listeners to hear the same sound.

Question 7

Stereo sound:

Answer 7

Sound mixed into two channels to give a sense of direction as speakers play
different parts of the audio.

Question 8

Surround sound:

Answer 8

Sound mixed into three or more channels to give more directionality than
stereo sound. Common surround formats include 2.1 (3 channels including subwoofer) and 5.1 (6 channels including subwoofer).

Question 9

how to record stereo

Answer 9

To record stereo two microphones are used and each must be sampled at the same sampling rate and bit resolution. This doubles the work involved in collecting the sound data.