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I'm going to shift gears into discussing ways we can enhance the audio on our videos.  In order to do this, we should take a whirlwind tour of how computers think about audio.

B2B-Audio-Wave.png
Think of the stereotypical "sound wave" above - simplified for our convenience.  The line goes up and down around a middle line - and this corresponds to the amount that the wave is displacing the air at that point (or its amplitude).  This is just another way of saying that it represents the amount of energy (and thus what we perceive as loudness) in the sound at a given point. 

Things like pitch (high sounds versus low sounds) come from how frequently the displacement switches from one direction to the other; that's why we call it frequency.  And when you have real-world sound, you have a whole lot of these waves adding and subtracting from each other, making the sound that much more complicated.

Perfect_fifth_graphs_no_text.png

Next time - Sample rates (44.1kHz, 48kHz, etc.) and bit depth
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Antialiasing 3 (Back to the Basics Series) was the previous entry in this blog.

Photo Montage to the music with Final Cut Pro is the next entry in this blog.

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