One of the most subtle but important features of the way sound is created and perceived, phase can be used both creatively and technically to improve the results of audio capture and reproduction. If you encounter a phase problem, it is usually easy to fix if you know what you're looking for. This video explains the underlying concept, and shows how easy it is to switch phase and restore your beautiful audio.
- [Narrator] When the surface of a speaker beats…the air, it starts from a resting position,…moves out to increase the air pressure,…then moves back through its resting position…into the speaker cabinet to create low air pressure…before returning to its resting position.…And that whole movement is one full cycle.…Professional studio monitors can complete…tens of thousands of cycles per second.…The precise timing is called the phase.…Because the movement is cyclic,…it can be measured in degrees just as…you might measure the angle of a hand…moving around a clock.…
Zero is the resting position,…90 is fully out, 180 is back to…the resting position, 270 is fully into…the speaker cabinet and then 360…is back to the resting position again.…Ideally to maximize amplitude…you will want two speakers in a stereo configuration…to move out and in exactly in sync.…If the speakers are producing the same frequency…at the same amplitude, for example…if they're producing a mono signal shared equally…between both speakers, then they can cancel out…
Get ready to remove the mystery behind terms you've encountered. If you work in a creative profession, this can enhance your command of the tools you use. Learn what a pixel really is, what color channels are, and what audio frequency is. Discover how color channels, bit depth, and video frame rates work. Find out the difference between codecs and file formats, and how compression is involved. By the end of this course, you'll know how to answer common client questions—like, whether a logo should be supplied in vector or bitmap form, and more.
Note: Motion graphics in this course were provided by Chelsea Parrish: chelseaparrish.com.
- What is a pixel?
- Aspect ratios
- Bit depth
- Alpha and transparency
- Light and color channels
- Color modes: RGB, YUV, CMYK
- Camera depth of field
- Chroma Key and Luma Key
- Blend modes
- Color wheels, vectorscopes, and waveforms
- Video compression and codecs
- Frame rates and timecode
- File formats
- Audio amplitude
- Capturing audio tone as frequency
- Audio timing using the phase
Skill Level Beginner
Learning Video Production and Editingwith Rob Garrott19m 25s Beginner
Video Foundations: Cameras and Shootingwith Anthony Q. Artis2h 58m Appropriate for all
Introduction to Video Dialogue Editingwith Ashley Kennedy3h 14m Appropriate for all
1. How Do Computers Think?
2. How Cameras and Computers Think about Color
3. The Language of Color
4. The Shape of Your Picture and the Speed of Your Video
5. Storing Everything (Codecs)
6. Color Wheels, Vectorscopes, and Waveforms
Understanding waveforms2m 39s
7. Making Changes
8. Audio Made Simple
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