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MRAT 6050 - Recording Seminar > Time Based Effects > Flashcards

Time Based Effects Flashcards

1
Q

What are the three types of time-based effects processors?

A
  • delay
  • reverb
  • echo
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2
Q

In reverb, what is direct sound?

A

the first sound arriving from a sound source

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3
Q

In reverb, what are early reflections?

A

discrete low order reflections

-single events are heard

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4
Q

In reverb, what is reverberation?

A

multiple diffuse reflections

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5
Q

Which element of the complete reverberant sound field is the best cue to determine the size of a space?

A

early reflections

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6
Q

What are the three reverb parameters?

A
  • pre-delay
  • early reflections
  • reverb time (RT60)/decay time
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7
Q

What are the four types of reverbs?

A
  • ambient/room tone
  • acoustical
  • mechanical
  • electronic/digital
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8
Q

What type of sound does ambient reverb capture?

A

natural sound of where the recording took place

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9
Q

Which type of reverb is expensive and hard to do well?

A

acoustical chambers

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10
Q

How does plate reverb work?

A
  • driver vibrates metal plate suspended by springs
  • transducers on the plate pick up reverb signal
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11
Q

What are 6 characteristics of digital reverb processors?

A
  • very flexible
  • parameter storage and recall
  • automation possibility
  • broad range of costs
  • updateable
  • limited lifespan
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12
Q

What are 5 characteristics of hardware based digital reverb processors?

A
  • analog and/or digital interfacing
  • single or multiple processing engines
  • often internal routing
  • often used with consoles
  • off-unit storage can be cumbersome
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13
Q

What are 3 characteristics of software-based digital reverb processors?

A
  • require adequate computer resources
  • parameters stay within session
  • portability
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14
Q

What is convolution reverb?

A

effects processing based on modeling of an actual space or device

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15
Q

What are the three functions of convolution reverb and how are they related?

A
  • first function is impulse
  • second function is audio
  • resulting function (reverb/tone) is product of mathematical operation applied
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16
Q

What are the six types of processes related to delay and echo?

A
  • delay
  • reverb
  • echo
  • slap
  • doubling
  • modulation
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17
Q

How does acoustic delay work?

A

two mics spaced apart; one close, one far

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18
Q

What is the function for tape delay?

A

delay is a function of the distance between the record and play heads, plus speed

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19
Q

What is the signal flow for tape delay (3 steps)?

A
  • signal sent from aux send
  • tape machine must be in “repro” mode and recording
  • signal from tape machine is returned and blended with original signal
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20
Q

How does analog delay work?

A
  • analog delay line: “bucket brigade” of capacitors (chain)
  • the longer the delay, the lower the frequency response
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21
Q

How does digital delay work?

A
  • samples signal and replays it later
  • frequency response depends on sample rate
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22
Q

What are the 3 main parameters for delay?

A
  • delay time
  • regeneration (feedback)
  • mix
23
Q

What are the 3 parameters for modulated delay?

A
  • rate
  • depth
  • waveform
24
Q

How does multi-tap delay work?

A
  • multiple delays allow for rhythmic repeat patterns
  • delay time and level can be set independently
25
What is pre-delay in reverb?
time between the direct sound and the first reflection
26
What is reverb time?
time between initial sound and when the reverb level decreases by 60dB
27
What sound does ambient/room tone reverb produce?
the sound of the room in which the recording was made
28
How is acoustical reverb made?
in chambers
29
What two types of reverb are considered mechanical reverb?
springs and plates
30
Which 2 types of reverb have a decelerating decay envelope?
- ambient - acoustical
31
Which two types of reverb have more low frequency content than other methods?
acoustical and ambient
32
Which 2 reverbs are dependent on room acoustics and mic number, type, and positions?
acoustical and ambient
33
What kind of reverb is big and bulky and needs isolated space?
plate reverb
34
What 2 types of reverbs are not very flexible?
acoustic and ambient
35
What two types of reverb are typically mono in and stereo out?
acoustical and ambient
36
What kind of decay envelope does plate reverb have?
linear
37
In modulated delay, what is rate?
speed of modulation (frequency of low-frequency oscillator)
38
In modulated delay, what is depth?
degree of delay time change
39
In modulated delay, what is waveform?
pattern of modulation
40
What is tube delay?
long tube; sound goes in tube and comes out other end later
41
Which type of reverb has no pre-delay, and therefore a 2D sound?
plate reverb
42
In spring reverb, what determines decay time?
length of spring
43
What is a good pre-delay for plate reverb?
tape delay
44
Which type of reverb's stereo image has a hole due to no interrelationship between left and right?
spring reverb
45
How does convolution reverb work?
- impulse response (IR) of a room is recorded - IR is "convolved" with input signal to recreate effect of source signal being played in the same acoustical environment the IR was recorded
46
What kind of reverb has an accelerating decay envelope?
spring reverb
47
What kind of reverb is sensitive to vibration and does not handle transients well?
spring reverb
48
What kind of reverb requires power, interfacing, and physical space?
hardware-based digital reverb
49
What is the process of delay in delay and echo?
a single duplication of a signal that is reproduced later in time
50
What is the process of reverb in delay and echo?
a cumulative "smear" of delays
51
What is the process of echo in delay and echo?
a distinct repetition(s) of a sound event (\>125ms)
52
What is the process of slap in delay and echo?
a single short delay (80-125ms)
53
What is the process of doubling in delay and echo?
a short delay mixed with the original signal to "fatten" the sound (30-80ms)
54
What is the process of modulation in delay and echo?
a pattern of change applied to one or more delay parameters

MRAT 6050 - Recording Seminar (7 decks)

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