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Audio Basics

Covering Audio basics for my online class, "Introduction To Music Production". Enjoy!
by

Jillian Carstensen

on 9 February 2015

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Transcript of Audio Basics

Frequency:
Measures how fast a sound wave is going.
Amplitude:
MEASURES the change of sound waves through air: How large or small those sound waves are.
For Example:
Sound is measured in waves, but because the air around it compresses and rarefies it, it is actually more like a pulse, pushed through the air.
For Example:
Amplitude measures the size of those pulses.
For Example:
The sound waves in this picture are the same amplitude (or loudness)
But, there are many more waves traveling per second in the top graph than in the bottom one.
Timbre:
Timbre is what makes a particular musical sound different from another, even when they have the same pitch and loudness.
Propagation:
Sound moving through a medium.
Audio Basics
Greetings to my fellow classmates! My name is Jillian Carstensen and I am From Montana.
Sound waves move through the air at different speeds, and are affected by the substance they are moving through, causing them to sound different to our ears depending on what kind of air or substance they are going through, or what kind of substance they are bouncing off of. This is what propagation is.
Sound waves can be affected not just by the type of air they are traveling through, but also the size and shape of the room they are in.
This affects how loud or quiet that sound is to our ears.
How does our ear perceive this? The top waves are going to sound much higher pitched (i.e a whistle), while the bottom waves are going to have a much lower pitch (i.e a bass guitar)
For Example:
A F sharp note has a specific frequency, or pitch.
But if you play F sharp on a piano, a flute, or a violin,
To the human ear, they would all sound different. (Remember propagation and how sounds are different when the bounce off or go through various substances?)
Today I will be going over the audio basics we learned earlier this week
So there you have it! A brief overview of the basics of sound.
Full transcript