Sine Wave
Swoopy
Square Wave
Boxy
Triangle Wave
Triangular
Compression
energy going up then back down
Rarefaction
energy going down the back up
Frequency
- A sound's pitch
- Mesured in cycles per second
- Hz
Cycle
A period of one compression and one rarefaction
Human Hearing
20Hz to 20,000Hz
Amplitude
- The energy level of a sound
- Decibels (dB)
Samples
Instantaneous measurement of an audio signal
Sample Rate
Number of samples used per second
ex. 44.1 kHz (44,100 samples per second)
Nyquist-Shannon sampling theorem
The sample rate has to be at least two times the highest frequency
Foldback/Aliasing
If less than two samples, lower frequency is created instead and distortion.
Bit depth
The 1's and 0's in a sample
Master files
Files that bring together all different elements
DAW
Digital Audio Workstation
1. Define Amplitude, Waveform, and Frequency
Amplitude: The energy of a sound
Waveform: The shape of a sound on a graph
Frequency: A sounds pitch measured in cycles per second
2. What unit of measure is used to indicate frequency?
Hurtz (Cycles per second)
3. What unit of measure is used to indicate amplitude of sound?
Decibels (dB)
4. What is the highest frequency that can generally be heard by a human?
20,000Hz
5. What does the Nyquist-Shannon Sampling theorem state?
The sample rate needs to be at least twice the highest frequency.
6. What is the max dynamic range of 24 bit audio?
144 dB
7. What versions support surround mixing
Both studio and ultimate
8. What is the windows modifier to the following Mac ones? Ctrl, Option, Command, Return
Command = ctrl
Option = Alt
Control = Start
Shift = Shift
Return = Enter
9. What device should be turned on last?
Monitoring spesakers
10. What is the default shortcut to start or stop playback?
...