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52 Cards in this Set
- Front
- Back
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Detail the benefits of using a DI Box on a musical instrument. |
Turns line level up to mic level so you can travel further to the board with cable with way less interference. |
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Why do we use a microphone preamp? |
Some mic signals are really low so you need a preamp to raise it before the board mix. |
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Describe the difference between Balanced and unbalanced lines. |
Balanced has (+) (-) and (G) in one while unbalanced has (+) or (-) but not both. Unbalanced can't travel far. |
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Why are microphone placement techniques important? |
Every instrument has different sounds, different sounds you want to achieve need different techniques. |
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Name the three primary types of microphones. |
Dynamic Ribbon Condensor |
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What is the pickup pattern of a omnidirectional microphone? |
From all around. |
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What is Transient Response? |
How good the material is to create a faster response, the quality. |
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What is the typical voltage used for phantom power? |
+48v |
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Describe the different between Amplitude and Frequency. |
Amplitude is the distance between peak and middle line/x-axis. Frequency is how many cycles in a second. |
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What does it mean to be out of phase? |
Two or more sound waves starting at different times/points of the cycle. |
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What is the speed of sound at standard temperature and pressure? |
1130 ft/s |
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Why are Early Reflections different then reverberation? |
Early reflections still occur when the sound is still going and bounces off surfaces back to you, reverberation is hearing the sound reflect off surfaces after the sound is played. |
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What are simple waves? |
A single tone. |
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What happens when you turn a level fader up by 3db? |
You double the intensity of the sound but that is when we just begin to notice a change. |
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Name the three bones of the inner ear. |
Hammer, Anvil, Stirrup |
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What is a transducer? |
One form of energy made into another. |
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How does a microphone act as a transducer? |
Takes sound waves and turns them into electrical energy. |
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Is the human ear a transducer? Why? |
Yes, sound waves turn into electrical waves. |
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Name three examples of a transducer |
Record, CD, Microphone |
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Briefly describe magnetic induction. |
Electrical current in motion creates a magnetic field while a magnetic field in motion causes an electrical current. |
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How does a speaker act as a transducer? |
Reversing it, the drum makes vibrations into electrical energy. |
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What makes one transducer better then another for a given purpose? |
Different material, 1,000 different mics are out there! |
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How is a phonograph cartridge a transducer? |
Turns patterns of grooves into electrical energy. |
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What factors can effect sound quality of a transducer? |
Material of it. |
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Why is it important to have a separate mix for monitoring? |
Because during live you can't have certain sounds be heard to the audience but backstage and actors need to hear for cues so it should be separately mixed to always be heard. |
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What is the signal chain of a mixer? |
Input > Send > EQ/Pan/Aux > Monitor > Output |
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Describe what an auxiliary send can be used for? |
An "effect" like reverb or harmonizer that goes in one aux input and can be sent to all the channels on the board. |
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What do channel assignments allow you to do? |
Basically organize your tracks/signals. |
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Describe the difference between a summing and distribution amplifier. |
Summing Amp. takes multiple inputs and makes it one. Distribution Amp. boosts signal to distribute to multiple outputs. |
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Why is it important for transistor amplifiers to have Thermal Protection? |
Heat builds up and can affect the sound output. |
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What is the process of over-dubbing? |
Adding something that wasn't on the original track. |
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Why Overdub, why do we need to do this? |
To add sound effects, ambience. |
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Describe a mix-down process. |
Listening to all parts, listen to each track/signal separately. |
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Describe why the signal chain concept is so important. |
For troubleshooting. |
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What is the EQ section used for? |
To cut out unwanted frequencies. |
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On a mixer what is an insert point connection used for? |
The effect (Reverb/Harmonizer for example) goes to one channel instead of an Aux. Send. It is individual to a track/signal. |
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What is Amplifier Saturation? |
Quality gets weird because input signal is so large, the DC current isn't large enough to produce the required corresponding output signal. |
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Describe how distortion and clipped waveforms are related. |
Both affect the sound and are very audible and sound odd. Order harmonics. (?) |
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Describe the basic principal behind the amplifier. |
Controlling the amount of volume. |
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How are a tube and transistor amplifier similar? |
Large amounts or small amounts can be tweaked easily. |
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What other devices do we find amplifiers in? |
Phone! |
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What is the basic concept behind a summing amplifier? |
Combines any number of inputs into a single output. |
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What is the basic concept behind a distribution amplifier? |
Taking a signals power and amplifying it so it can be sent to multiple places. |
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Describe the difference between a summing and distribution amplifier. |
They are the reverse of each other. |
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Why is it important for transistor amplifiers to have thermal protection? |
Thermal electron movement distortion happens when it is too hot. |
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Name an instrument that is commonly used with a DI Box. |
Guitar. |
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Explain the 3:1 distance rule. |
Mics should be 3x the distance apart from source and mic. |
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Describe the directional response in relation to a mics pickup pattern. |
Output level at various angles of incidence. |
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A microphone with a higher sensitivity rating will produce a stronger what? |
Will produce a stronger output signal voltage. |
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What microphone type uses electromagnetic induction to generate an output signal? |
The ribbon microphone. |
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What principal does the condenser mic use to generate output? |
Electrostatic Principal |
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What is phantom power? Why? |
Power directly from console, most condensers and some ribbon mics need it. |
