# Shared Flashcard Set

## Details

Show Production Systems
Midterm Exam Review
67
Engineering
02/13/2013

Term
 Name three pieces of information that are always included in a good input list.
Definition
 Splitter Channel, Name of the input, Microphone or DI
Term
 What is the purpose of setting good console and system gain structure?
Definition
 To avoid clipping at any given point in the system, Never have distortion, Minimize system noise
Term
 _____________ are used to control one or more input channel faders from one master fader.
Definition
 VCA
Term
 Describe two ways that signal polarity can be reversed besides the polarity button on a mixing console.
Definition
 1. Positive and Negative crossed from Amp to Speakers2. XLR Pins 2 and 3 are reversed
Term
 How much additional amplifier power is required to double the loudness of a loudspeaker system?
Definition
 10x the power = 2x loudness
Term
 What are the three steps to expressing a power change in dB?
Definition
 1. Compare2. Compress3. Scale
Term
 What is the +4dBu standard, and what equipment uses this standard?
Definition
 Pro Line Level = 1.23v
Term
 What is the -10dBV standard, and what equipment uses this standard?
Definition
 Consumer Line Level = 0.316v
Term
 When adjusting a level control on a sound system, a change in _________________ is being made.
Definition
 Voltage
Term
 Describe what the term “ring out” refers to.
Definition
 The process of removing feedback frequencies from the monitoring system and making the system stable enough, with enough gain, to operate the show.
Term
 How much power will an amplifier outputting 126 volts into an 8Ω load deliver?
Definition
 P=E²/R P=126²/8 P=1984.5 Watts
Term
 Describe the inverse square law.
Definition
 For every doubling of distance away from the sound source, the acoustical reduces by 6dB. 20xLog(distance1/distance2). Distance can be in either feet or meters.
Term
 The decibel can be used to express _______________ or _________________ levels within an audio system.
Definition
 Absolute or Relative
Term
 0dBm
Definition
 0.001 watt
Term
 0dBW
Definition
 1 watt
Term
 dBu
Definition
 0.775 volt
Term
 0dBV
Definition
 1 volt
Term
 0dBSPL
Definition
 0.00002 pa
Term
 There is a fixed relationship between dBu and dBV. For any dBV value, add __________ to find the corresponding dBu value.
Definition
 2.21dB
Term
 Define the term “acoustic gain”
Definition
 The amount of gain a system provides to an un-amplified sound source.
Term
 Define the term “potential acoustic gain”
Definition
 AKA "Gain before feedback" or "PAG"The amount of gain a system can achieve before feedback.
Term
 Define the term “loop unity gain”
Definition
 When the source and the loudspeaker reinforcing the source are equal in level at the mic capsule.
Term
 Name three things that factor into the potential for feedback.
Definition
 1. Response of speaker2. Mic Response3. Acoustic Environment
Term
 How does changing the distance between the source and the mic affect acoustic gain?
Definition
 Doubling the distance = lose 6dBHalf the distance = gain 6dB
Term
 How does changing the number of open microphones on stage affect acoustic gain?
Definition
 Doubling the mics = lose 3dBMore mics = less acoustic gain
Term
 Define the term “loudspeaker Q”
Definition
 A measure of directional properties of a loudspeaker.
Term
 What are two options at a sound engineer’s disposal when dealing with difficult acoustic environments?
Definition
 C-ducer, Helpinstill Piano Sensor
Term
 Name 3 ways that you can improve gain before feedback.
Definition
 1. Use as few mics as possible2. Mic as close to the source as possible3. Take advantage of mic and speaker directionality
Term
 What attributes of a loudspeaker affect acoustic gain?
Definition
 Frequency response, Polar Pattern, Sensitivity
Term
 What attributes of a microphone affect acoustic gain?
Definition
 Frequency response, Polar Pattern, Sensitivity
Term
 When ringing out a monitor wedge, the first two cuts should be done on the _____________ _____________.
Definition
 Channel Strip
Term
 Describe the primary difference between an “all in one” digital console and a “component based” digital console.
Definition
 The primary difference is the ability for expansion. All in One has limited expansion ability while the Component based has more expansion options. All in One has everything built into the surface while the component based has separate racks. All in One is a more affordable console then the component based.
Term
 What type of cabling does an Avid Venue system use to connect the stage rack to the FOH rack?
Definition
 75Ω COAX w/ BNC connectors
Term
 What type of cabling does an Avid Venue system use to connect the FOH rack to theworksurface?
Definition
Term
 What type of cabling does a Venue system use to connect the FOH rack to a Pro Tools HD system?
Definition
Term
 A stock Avid Venue stage rack is configured with ________ analog inputs and _______ analog outputs.
Definition
 48 inputs/8 outputs
Term
 A stock Avid Venue FOH Rack is loaded with ________ DSP cards, and can be upgraded to _________ total DSP cards.
Definition
 Comes with 3. Can upgrade to 5.
Term
 A stock Avid Venue Mix Rack is loaded with ________ DSP cards, and can be upgraded to ________ total DSP cards.
Definition
 Comes with 2. Can upgrade to 3.
Term
 (T/F) Changing the number of graphic EQ’s configured on Venue affects the system’savailable DSP resources.
Definition
 True
Term
 (T/F) Changing the number of FX returns configured on Venue affects the system’s available DSP resources.
Definition
 True
Term
 Digico consoles use the __________ protocol for digital audio transmission.
Definition
Term
 Multiple Digico consoles can share a single stage rack using a system called ______________ ___________________.
Definition
 Gain Tracking
Term
 Name two companies that make personal monitor mixing systems.
Definition
 Aviom, Avid PQ
Term
 A single Avid HDx card can output _______ channels of digital audio into a Pro Tools HD2 system.
Definition
 64
Term
 A Venue system loaded with an FWx firewire card can output _______ channels of digital audio into a Pro Tools LE system.
Definition
 32
Term
 In order to connect a second stage rack to an Avid Venue system, you must add a ______________ card to your __________ rack.
Definition
 Snake 2, FOH
Term
 What two pieces of equipment can be used to record MADI digital audio into a Pro Tools system?
Definition
 Avid --> HD MADISSL --> XLogic Delta
Term
 What is a “virtual soundcheck?”
Definition
 The process of using multitrack recordings instead of a live band for soundcheck input material.
Term
 The frequency setting on a high pass filter can also be called the ___________________ ___________________.
Definition
 Knee Frequency
Term
 On a proportional Q equalizer, the bandwidth changes as a function of the amount of _______________ or ______________.
Definition
 Boost or Cut
Term
 What are the three parameters of a parametric EQ?
Definition
 1. Center frequency2. Gain3. Bandwidth (Q)
Term
 What are the two parameters on a traditional shelving EQ?
Definition
 Gain and Frequency
Term
 What is the one parameter of a high pass filter?
Definition
 Frequency
Term
 Define the term octave.
Definition
 A 2:1 or 1:2 frequency ratio. Examples: 200-400Hz, 1kHz-2kHz, 500-250Hz
Term
 The octave below 1kHz is…
Definition
 500Hz
Term
 SRI
Definition
Term
 SRO
Definition
 8 Channels of analog output
Term
 DSI
Definition
 AES/EBU digital audio input card
Term
 DSO
Definition
 AES/EBU digital audio output card
Term
 A-Net
Definition
 Aviom Personal monitoring interface card
Term
 DSP Mix Engine
Definition
Term
 ECx
Definition
 Ethernet connectivity card
Term
 FWx
Definition
 Pro Tools firewire interface LE (32 channels)
Term
 HDx
Definition
 Pro Tools digilink interface card (64 channels)
Term
 Iox
Definition