The flashcards below were created by user
SeanHatfield
on FreezingBlue Flashcards.
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Where is mic level?
Distortion?
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Connecting from pro level (+4dBu) output to consumer level (-10dBV) input can lead to...
Overload/Distortion
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+4 dBu = ____ volts
-10 dBV = ____ volts
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What do bump boxes do?
Match levels between consumer and professional gear or between balanced and unbalanced.
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Describe a balanced input/output.
How many pins does a balanced input/output have vs an unbalanced one?
- Has equal impedance on both conductors.
- Balanced: 3
- Unbalanced: 2
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Pro mic inputs are...
Pro line level inputs are...
Consumer audio gear is...
- Balanced
- Balanced or unbalanced
- Unbalanced
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The standard microphone plug is...
XLR
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1/4 inch (guitar Jacks)
A _______ connector is mono balanced.
A _______ connector is stereo unbalanced or mono balanced.
- Tip sleeve (TS)
- Tip ring sleeve (TRS)
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Tip sleeve (mono unbalanced)
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Tip ring sleeve (mono balanced or stereo unbalanced)
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The most common professional console patch bay cable used today:
Bantam
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What do spectrum processors do?
Adjust the amplitude of the frequency spectrum and making out = input (EQ).
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Technical reasons for EQ:
Aesthetic:
-Compensating for frequency variations during recording, storage, transmission, and reproduction. -Reducing noise.
Balancing a mix and adjusting the timbre.
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The cut-off frequency is...
3 dB down from nominal level.
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What is bandwidth?
“space” between cut off frequencies (subtract the low frequency cutoff from the high frequency cutoff).
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Slope is measured in...
6dB per octave
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What is shelving EQ?
Increase or decrease a continuing amount of frequencies from a point.
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Q =
fc/Bw (center frequency / bandwidth)
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What is parametric EQ?
Parametric Eq provides control over all three parameters: center frequency, boost/cut, Q or Bandwidth
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What are dynamic processors for?
Dynamics processors all work on the dynamic range of an audio source (loudness/quietness).
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What are compressors?
- amplifiers whose gain decreases as the input level increases.
- output level remains constant regardless of the input level.
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What does unity gain mean?
No change in amplitude.
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What is threshold?
the input level at which the compressor turns on (gain is reduced).
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What is the compression ratio?
the ratio of dB in to dB out (above the threshold).
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Why do we need time processors?
The advent of multitrack recording brought with it close micing and acoustically dead rooms necessitating the creation of artificial reverberation
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What is RT60?
The decay time is the time it takes the reflected signal to reduce by 60 dB (RT60).
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What is an echo chamber?
an acoustically isolated room with highly reflective wall coverings in which are placed speakers and microphones.
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What are reverb plates?
- Echo Plates were metal sheets (plates) suspended on a frame an input transducer and 2 output transducers affixed directly to the sheet.
- Vibrations would reflect off the edges of the sheet as sound would reflect off of walls.
- They have a particular sound (not natural sounding)
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What is spring reverb?
Spring reverb does not have an Early Sound Field and has a par/cular “twangy” sound.
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What are the three heads of analog tape machines?
Erase, record, reproduce
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What is flanging?
- Time delay with the creation of a shifting comb filter using a shifting time delay.
- In flanging, the delayed signal is combined with the non-delayed signal to create constructive and destructive phase interference.
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What is chorus?
Time delay that takes the original signal, doubles it, slightly pitch shifts it
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