Class Test

Question 1

What is Procedural Programming?

Answer 1

Structured, in sequence, function focused, type of programming.

Question 2

What is Object Oriented Programming?

Answer 2

Flexible, divided into objects, more abstraction, type of programming.

Question 3

Classes can do what? (3)

Answer 3

1. Encapsulate data structures
2. Define custom data types
3. Inherit from other classes

Question 4

Most Classes contain what? (4)

Answer 4

1. Data members (variables specific to class)
2. Function members (functions of class that define behaviour)
3. Constructor Function
4. Destructor Function

Question 5

When does a Constructor function run?

Answer 5

When a class instance is created.

Question 6

When does a Destructor function run?

Answer 6

When object of a class is destroyed.

Question 7

What is a Object?

Answer 7

An instance of a class, each instance needs a name.
Objects can access functions and variables within the class.

Question 8

What are the 3 Access Modifiers?

Answer 8

1. Private (only accessible within same class)
2. Public (accessible anywhere)
3. Protected (only accessible within same class, and any that inherit it)

Question 9

What is the Default Access Modifier?

Answer 9

Private.

Question 10

What is Data Encapsulation?

Answer 10

Hiding internal state (all interaction through functions)

Question 11

What is the Inheritance Hierarchy?

Answer 11

Subclasses inherit functionality from Parent classes.

Question 12

What are Audio Streams?

Answer 12

Flow of audio data, typically broken up into buffers.

Question 13

What is a Callback, give an example?

Answer 13

Audio Devices have quartz crystals used for timed call backs, this is used to process audio.
Processing Block is an example of this.

Question 14

What does a Low Buffer result in? (2)

Answer 14

1. Low latency
2. High processing

Question 15

What does a High Buffer result in? (2)

Answer 15

1. High latency
2. Low processing

Question 16

What is a Buffer Dropout?

Answer 16

When the buffer empties faster than it can be refilled.

Question 17

What type of system do Buffers use to input/output data?

Answer 17

FIFO
First In, First Out

Question 18

What does “Call by Value” do?

Answer 18

Changes a copy of a value.

Question 19

What does “Call by Reference” do?

Answer 19

Changes original value.

Question 20

What are Subjects also known as?

Answer 20

Broadcasters.

Question 21

What are Observers also known as?

Answer 21

Listeners.

Question 22

What is the difference between a “Virtual Function” and a “Pure Virtual Function”?

Answer 22

Virtual functions CAN be overridden.
Pure Virtual functions MUST be overridden.

Question 23

How to calculate Max Delay Time?

Answer 23

BufferSize / SampleRate * 1,000

Question 24

How to calculate Min Delay Time?

Answer 24

1 / SampleRate * 1,000,000

Question 25

What type of Buffer do Delay Lines have?

Answer 25

Circular Buffer

Question 26

What is Interpolation?

Answer 26

Interpolation is used to approximate values that lie between those in memory.

Question 27

How to turn Samples into Milliseconds?

Answer 27

(Time in Samples / SamplingRate) * 1,000

Question 28

How to turn Milliseconds into Samples?

Answer 28

Milliseconds * (SamplingRate / 1,000)

Question 29

What happens when you Modulate the Read Index of a buffer?

Answer 29

The Modulation Source is summed with the Read Index, changing the distance from the Write. This change cannot be Higher than the Min/Max Delay Time.

Question 30

What happens in a Linear Audio Effect System?

Answer 30

Input is changed in Amplitude and Phase only. Shape is not changed.

Question 31

What happens in a Nonlinear Audio Effect System?

Answer 31

Shape of Input is changed, resulting in additional frequency content.

Question 32

Benefits of WaveShaping? (3)

Answer 32

1. Memoryless 2. Low Computation 3. Only relies on Input Signal

Question 33

What is the WaveShaping Function?

Answer 33

y = f (x) y = Output x = Input f = Nonlinear Function

Question 34

What is Total Harmonic Distortion?

Answer 34

THD measures the harmonies added in distortion.

Question 35

What are the types of symmetrical distortions? (3)

Answer 35

1. Odd - only odd harmonics. 2. Even - only even harmonics. 3. Asymmetrical - both odd and even harmonics.

Question 36

What are Multiband Effects?

Answer 36

The application of processing in parallel frequency bands

Question 37

What are the types of Crossover Filters? (2)

Answer 37

1. Infinite Impulse Response (IIR) 2. Finite Impulse Response (FIR)

Question 38

What criteria do Crossover Filters need to meet? (3)

Answer 38

1. Flat pass band with no distortion. 2. Maximum attenuation (steep) in stop band. 3. Output should produce flat, unchanged signal.

Question 39

What are common parameters in a Dynamic Range Processor? (4)

Answer 39

1. Threshold 2. Ratio 3. Attack/Release Times 4. Knee (Width)

Question 40

What do Dynamic Range Processors do to the signal? (3)

Answer 40

1. Gain = Boosted or Attenuated 2. Threshold = Above or Below 3. Dynamic Range = Increased or Decreased

Question 41

How to code a "For Loop"?

Answer 41

for ( int x = 0; x < 10; x++ ) { "Code Here" }

Question 42

What happens in the .h File?

Answer 42

Declaration

Question 43

What happens in the .cpp File?

Answer 43

Definition

Question 44

What must the Audio Buffer be large enough to accommodate for?

Answer 44

The maximum number of Input/Output Channels used by the Audio Processor.

Question 45

How to calculate the WriteIndex?

Answer 45

writeIndex = (writeIndex + 1) % bufferLength;

Question 46

How to calculate the ReadIndex?

Answer 46

readIndex = ((writeIndex - delayTime) + bufferLength) % bufferLength;

Question 47

How to calculate the DelayTime using Read/Write?

Answer 47

delayTime = ((writeIndex – readIndex) + bufferLength) % bufferLength;

Question 48

Benefits of a Fractional Delay Time? (2)

Answer 48

1. Allow precise delay times. 2. Avoid signal discontinuities when the delay time is modulated.

Question 49

How to code a simple DelayLine? (4 Lines)

Answer 49

float dry = channelData[i]; // Write Index float wet = mDelayLine.popSample(channel, DelayTime); mDelayLine.pushSample(channel, dry + (wet * mFeedback)); channelData[i] = (in + temp) * Wet/DryValue;