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Audio Engineering-EQ
Mostly EQ and some randoms!
61
Engineering
Undergraduate 1
11/22/2008

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Cards

Term
What are the 5 components of a microphone preamp?
Definition
Gain/Trim, Pad, Phase/Polarity, Phantom Power, Mic/Line Switch
Term
What is the formula for power?
Definition
P=I*V
P=Power (watts)
I=Current (amps)
V=Voltage (volts)
Term
What is the formula for voltage?
Definition
V=I*R
V=Voltage (volts)
I=Current (amps)
R=Resistance (ohms)
Term
Where are EQ knobs on a console? In software?
Definition
On a console, they are within channel strips. In software, they are the "inserts" or "sends".
Term
In Binary, what do "0's" and "1's" represent?
Definition
0's represent off and 1's represent on.
Term
What does EQ stand for?
Definition
Equalization
Term
What are four types of Dynamic Processors?
Definition
Compressor, Limiter, Upward Expansion, Downward Expansion
Term
EQ is typically post-tape and pre-fader. True or False?
Definition
True
Term
What is an ADC?
Definition
Analog to digital converter
Term
What is DAC?
Definition
Digital to analog converter
Term
You must have these two types of converters in your signal flow.
Definition
ADC and DAC
Term
What is sample rate?
Definition
The number of times per second a picture is taken of your sound (a snapshot of voltage) (width of stairs)
Term
What is bit-depth?
Definition
Binary word length (number of stairs)
Term
What are common sample rates?
Definition
44.1k, 48k, 88.2k, 96k, 176.4k, 192k
Term
2 to the 16th power is how many bits? How many voltages can be recognized with this bit-depth?
Definition
16-bit, 65,536 different voltages can be recognized
Term
What is a byte?
Definition
A digital word
Term
What are header and footer bits?
Definition
8 bits added to either the front, back or both (4 and 4) or a binary word. They tell a computer which signal format you will be working with.
Term
What is dither?
Definition
Dither smooths out the stairsteps of digital to analog conversion of the signal.
Term
1-bit is how much dynamic range?
Definition
6dB
Term
What is another name for Peak-Notch EQ?
Definition
Parametric EQ
Term
What is another name for an equalizer?
Definition
Filter
Term
What are the three controls of Peak-Notch (Parametric) EQ?
Definition
Gain, Frequency, Q
Term
What is the Q?
Definition
Quality Effect (shape of bell at -3dB points on either side of peak)
Term
Does Low-Q have a wide or narrow bell curve?
Definition
Wide
Term
Does high-Q have a wide or narrow bell curve?
Definition
Narrow
Term
What are three types of EQ?
Definition
Parametric/Peak-Notch, Shelving, High-Pass/Low-Pass
Term
On a Peak-Notch (Parametric) EQ, what controls the boost or cut in dB level?
Definition
Gain knob
Term
What is a 1-Band Parametric EQ?
Definition
Only 1 band of frequencies are controlled (Highs, Mids, Lows) with a set of knobs.
Term
What frequencies are controllable in a 2-Band Parametric EQ?
Definition
Highs and Lows
Term
What frequencies are controllable in a 3-Band Parametric EQ?
Definition
Highs, Mids, Lows
Term
What frequencies are controllable in a 4-Band Parametric EQ?
Definition
Highs, High Mids, Low Mids, Lows
Term
What frequencies are controllable in a 5-Band Parametric EQ?
Definition
Highs, High Mids, Mids, Low Mids, Lows
Term
What are two other names for a Semi-Parametric EQ?
Definition
Quasiparametric, Sweepable
Term
What is a Semi-Parametric EQ?
Definition
EQ that has anything less than fully controllable frequency, gain and Q knobs. This includes switchable controls.
Term
What is shelving EQ?
Definition
It works on either the low end or high end and is determined by + or - 3dB
Term
What is the purpose of switching the "EQ ON" function to off?
Definition
Reduce noise, Avoid extra circuits
Term
What is another name for a Shelving EQ that only cuts high or low frequencies?
Definition
High-Pass Filter or Low-Pass Filter
Term
What is a High-Pass Filter?
Definition
Low-Cut Filter-Allows frequencies only higher than it's cut off frequency to pass (at -3dB).
Term
What is a Low-Pass Filter?
Definition
High-Cut Filter-Allows frequencies only lower than it's cut off frequency to pass (at -3dB).
Term
How are High-Pass and Low-Pass Filters measured?
Definition
dB/Octave Rolloff
Term
Which rolloff is more steep?: 6dB/Octave or 12dB/Octave
Definition
12dB/Octave Rolloff
Term
Is a capacitor hardware or software?
Definition
Hardware
Term
What does a capacitor create?
Definition
Filters and Rolloffs
Term
In a capacitor, each order gets a deciBel increase of how much?
Definition
6dB
Term
Why do capacitors need to be an odd numbered order?
Definition
Because a capacitor creates a 180 degree phase shift so an even number of capacitor orders would cancel out all sound.
Term
What is a 1/3 Graphic EQ?
Definition
Hardware version of EQ where each 1/3rd octave has a designated slider (3 sliders per octave).
Term
Is a Graphic EQ artistic or correctional?
Definition
Correctional
Term
Where, in signal flow, does a processor fit?
Definition
Between EQ and Channel Fader
Term
Processors are also known as inserts. True or False?
Definition
True
Term
What type of connector is on each end of an insert cable?
Definition
TRS connector on one side, 2 TS's on the other.
Term
Describe the TS connectors on an insert cable.
Definition
There are two TS connectors on one end of an insert cable. One is labled tip, send or left and the other is labled ring, return or right.
Term
0 Vu is how many dBm?
Definition
+4 dBm
Term
What are the parameters of compression?
Definition
Threshold, Makeup Gain, Ratio
Term
What do the numbers in a compression ratio represent?
Definition
dB input:dB output
Term
What is the difference between compression and limiting?
Definition
Ratio (Limiting ratio is generally about 20:1)
Term
With compression, what does the red meter represent?
Definition
Gain Reduction
Term
What is gain reduction?
Definition
How much signal is being compressed
Term
What units are attack and release measured in?
Definition
Milliseconds
Term
What is a sudden bend in the dB cut/boost called?
Definition
Knee
Term
What is another name for a downward expander?
Definition
Noise Gate
Term
A downward expander/noise gate has 3 main controls. What are they?
Definition
Attack Time, Hold/Decay, Release
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