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32 Cards in this Set

  • Front
  • Back

What is Sound?

Sound is a periodic variation of atmospheric pressure.


Area of higher than normal atmospheric



Area of lower than normal atmospheric



The Distance above or below the center line.

Amplitude is measured in decibels (dB)


The amount of waves per second (Or cycles per second).

Frequency is measured in Hertz (Hz)

C.P.S (Cycles Per Second)

100 C.P.S = 100 Hz

1000 Hz = 1 Kilo Hz

2500 Hz = 2.5 Kilo Hz

10,000 Hz = 10 Kilo Hz

Human hearing range

Humans can hear 20 Hz --> 20 kHz

Humans have a sensitivity to hearing from 1 kHz to 4 kHz.

1. It's the frequency at which babies cry.

2. The intelligibility range of human speech.


The relationship between 2 identical wave forms.

When 2 identical wave forms are perfectly in phase, their combined output doubles.

When 2 wave forms are 180 degrees out of sync they are equal to 0

Speed of Sound

1,130 feet per second

100 Hz measures 11.3ft

1kHz = 1.13ft


Digital Audio Workstation (Pro Tools)

Sample Rate

The amount of times the computer records the incoming sound per second.

Post production standard

48 kHz

44.1 kHz 96 kHz

48 kHz 192 kHz

Nyquist Theorem

In order to record the highest desired frequency sample rate must be twice as high as that


Bit Depth

Amplitude component

The more Bits the more sound level

A|D D|A Converter

Analog to Digital vice versa.


The time it takes to record and playback the

digital audio.


When sample rates aren't spaced evenly

Pro Tools has two main windows

- Edit

- Mix

Transient Noises

They clip but don't register.

Distortion is above the red mark for a long

period of time.

Clipping is it taps the red marker.


Is a global modifier


First person to add sound to movies (multiple tracks)

Performed sound effects



Pro Tools 4 main modes of operations

Shuffle F1 Spot F3

Slip F2 Grid F4

When importing sound

Always copy/convert never add

Shuffle Mode

Snaps audio files together (Most dangerous mode in the whole wide world. It'll bleep your face)

F5 -> 10

F5 - Zoom

F6- Clipping Tool

F7- Select Tool

F8- Grab Tool

F9- Scubber Tool

F10- Pencil Tool


Command, H

B- Cut

Command, H - Heal Cut

Pro Tools has 3 main modes of playback

Timeline insertion follows playback N - on/off

Command, K (pre-roll on/off) or command, 1 num pad

Link timeline and edit, Shift forward slash

Sizing Tracks

F7 -> hold control -> arrow up or down to size

Hard Cut

jump the cut, 3 frames before and 3 frames after


Should sit in lower 1/3 when mixing


Control, click w/grabber -> snaps to beginning of clip

Control, command click w/ grabber -> snaps to end of clip