Midterm Rec103 Flashcards
1
Q
period of a wave
A
T = 1000mls / frequency
or 1 sec/frequency
2
Q
Compression
A
squeezing molecules into an area creating a region of higher pressure
3
Q
Rarefaction
A
the area opposite of compression. Region of lower pressure
4
Q
Velocity of Sound
A
1130ft/sec (at 68 degrees F)
5
Q
PFL
A
Pre-fader Listen
Mono, Non Destructive
6
Q
Lambda
A
lambda = velocity/frequency
7
Q
AFL
A
After Fader Listen
Stereo, Destructive
8
Q
Pro Operating Level
A
+4dBu = 1.228 (1.23v) = 0dBVu = -18dBFs
9
Q
Amplitude Measurements
name three
A
Peak to Peak
Peak
RMS
10
Q
Ratios used to calculate Harmonics of a frequency
A
2 : 1 going up
1 : 2 going down
11
Q
What stays constant in a parallel circuit?
A
VOLTAGE
12
Q
Voltage stays constant in what type of circuit?
A
Parallel
13
Q
What stays constant in a series circuit?
A
Current
14
Q
Current stays constant in what type of circuit?
A
Series
15
Q
Series circuit calculations:
A
- Resistance Total (ohms) R1 + R2 + R3
- Current Total.
I = V / R - Voltage Drop/Loss
a) V = I x R
b) V = I x R
c) V = I x R
16
Q
Parallel circuit calculations:
A
- Resistance Total (Ohms)
- Current Total.
I = V / R - Current Drop/Loss
a) I = V / R
b) I = V / R
c) I = V / R
17
Q
When sending to a time based effect unit, that send should be?
A
Post Fader Aux
18
Q
A common path assign for a signal is known as?
A
Bus Assign
19
Q
Unity Gain between the input and output of a device refers to?
A
No change in level
20
Q
A bus on a desk/console is used to?
A
Route inserts to the aux returns
21
Q
A bus output on a desk is usually used to?
A
to get to the multi-track recorder
22
Q
What does AFL solo mean?
A
After Fader Listen
23
Q
What does PFL solo mean?
A
Pre Fader Listen
24
Q
Which is the correct combo for PFL solo?
A
Mono Non Destructive
25
Peak/Clipping LED’s on the channel paths input should?
Rarely Illuminate
26
Channel insert points are used for?
Adding a dynamic processor
27
While working in a studio we always monitor via?
the LR main bus
28
Phantom power is AC or DC?
DC
29
What is Phantom Power
48v and powers condenser mics
30
A stage monitor mix or studio headphone mix is sent?
Pre Fader Aux
31
RMS formula
Peak x 0.707
or
Peak / 1.414
32
A Variable resistor that adjusts voltage is known as?
potentiometer
33
The unit of potential difference is?
Volt
34
Impedance is the total resistance to the flow of?
AC
35
Resistance is the total resistance to the flow of
DC
36
Impedance is represented by which letter?
Z
37
An electoral circuit in which current only flows in one direction is?
DC
38
An XLR is a Mic/Line connector on which pin 2 is:
HOT
39
in a TRS cable the tip is
HOT
40
in an XLR cable the ground is PIN number ___
1
41
A Device that converts energy from one form to another:
Transducer
42
A component that helps converts AC to DC i
diode
43
Voltage has a more appropriate name which is
EMF
44
Calculations for Voltage
V = I x R
45
For a conductor to conduct, the material must have
Free Electrons
46
Measurement for capacitors
Farads
47
the Two Types of Capacitors
Ceramic and electrolytic
48
Transistors are used to __
Amplify
49
the Two Type of transistors
NPN & PNP
50
the Two Types of Potentiometers
Logarithmic & Linear
51
A switch when it is open means
it is OFF
52
Adding batteries in a series means that the voltage
becomes higher
53
What is a capacitor?
Stores charge and discharges it into circuit when there is a drop in charge
54
LED stands for
light emitting diode
55
the Two Types of Switches
```
Normally Open (N.O.)
Normally Closed (N.C.)
```
56
What does a battery do? and what happens when you put multiple together?
stores power. in series voltage adds up
57
What is a diode?
Allows current to pass through them in one direction.
58
What is a transistor?
amplifies small current so that a larger current can pass between its collector and emitter pins
59
What is a potentiometer?
Variable resistor
60
Ohms Law
the relationship between between voltage, current, and resistance
61
What is the electrical potential for a source in a circuit referred to as?
Voltage, aka EMF
62
What is the flow of electric charge referred to as?
Current
63
What does AC stand for?
Alternating current
64
What does DC stand for?
Direct Current
65
a. What does V stand for?
b. What does I stand for?
c. What does R stand for?
Voltage
Current
Resistance
66
Identify the symbol
Resistor
67
Identify the symbol
Ceramic Capacitor
68
Identify the symbol
Electrolytic Capacitor
69
Identify the symbol
Diode
70
Identify the symbol
Potentiometer
71
Identify the symbol
LED
72
Identify the symbol & types (left to right)
Switches
N.O. Normally open
N.C. Normally closed
73
Identify the symbol
Battery
74
What is Pre-Fader Aux used for?
Stage monitors, Cue mix, H/P mix
75
What is PFL used for?
Level setting, solo
76
On a mixer, how do you tap the audio signal after the EQ, pan, and fader?
```
A) Post Aux
B) PFL
C) Bus Assign
D) Post Fader Aux
E) AFL
F) Pre Fader Aux
G) Insert
```
AFL
77
What is Post-Fader aux used for?
FX sends, Time based processors
78
the Flow of electrons through a conductor or circuit
79
the Law of Electrostatics
80
This room houses the console, monitors and outboard gear
81
Worlds MIDI Standard connector
82
Electronic component that stores a charge
capacitor
83
Studio transducer that operates in reverse of the Mic
84
a measure of the "load" on a circuit
85
a material that allows an electric current to pass very well
conductor
86
Fletcher-Munson Curves are a measure of what?
Equal Loudness
87
Harmonics + fundamental frequencies = _____
timbre ?
88
Distance between two corresponding points on a sound wave which are in phase
Amplitude
89
the brain determines the direction of a sound by using what?
arrival time difference, intensity difference, and phase shift
90
adding two waves together that are separated by 90 degrees produces what?
comb filter?
91
When sending to a time based effect unit, that send should be what?
92
where is a stage monitor/studi/cue headphone mix sent?
93
ratio for an Octave
8:1
94
the Mackie 16:4:2 means what?
16 channels, 4 bus, stereo
95
How is an insert cable wired?
96
What type of switch is a Relay?
Electromagnetic switch
97
TILEMFADPA
Trim, Insert, Low Cut, EQ, Mute, Fader, Aux, Direct, Pan, Assign
98
How many conductors must a balanced line have?
2 or 3
99
How many conductors does an unbalanced line have?
1
100
what does a transformer do?
has the ability to boost or lower voltage and current levels
101
Which do you use to create a headphone mix?
A)Pre Fader Aux
B)PFL
C)Post Fader Aux
D)AFL
Pre Fader Aux
102
Which do you use to create a headphone mix?
A)Pre Fader Aux
B)PFL
C)Post Fader Aux
D)AFL
Pre Fader Aux
103
```
Which do you use for the stage monitors?
A)Pre Fader Aux
B)PFL
C)Post Fader Aux
D)AFL
```
Pre Fader Aux
