Audio

Question 1

is also a perfect way for
teaching

Answer 1

Speech

Question 2

or sound
refers to the original sound signal

Answer 2

Analog audio

Question 3

the sound used in multimedia application is

Answer 3

digital audio.

Question 4

It is a multimedia application that uses dialogue, recorded narration, music, and soundeffects.

Answer 4

Sound

Question 5

tracks are used to capture the user’s attention and make them focused on the map, animation or the selected element. They are no longer than a fewseconds.

Answer 5

Short sound

Question 6

(often music or ambient sound) creates a
pleasant atmosphere for map perception. Positive perception of visually transmitted information can also be enhanced by sound effects that have no relation to the theme of the map.

Answer 6

Background sound

Question 7

that are activated when selecting a symbol or moving the cursor over can include applause (for theatres), fan cheering (for stadiums), a plane taking off (for airports), ocean wave splash (for beaches) or crowd noise (for marketplaces).

Answer 7

Sound effects

Question 8

is the actual representation of sound, stored in
the form of samples

Answer 8

Digital audio data

Question 9

represent the amplitude (or loudness) of sound at a discrete point in time

Answer 9

Samples

Question 10

The quality of digital recording depends on
the ______ that is, the number of samples
taken per second

Answer 10

sampling rate (or frequency),

Question 11

three sampling frequencies most often used

Answer 11

CD-quality 44.1 kHz, 22.05 kHz, and 11.025 kHz.

Question 12

is a process of converting the analog signals to a
digital signal.

Answer 12

Digitization

Question 13

Three steps of digitization

Answer 13

Sampling, Quantization, Encoding

Question 14

is a process of measuring air pressure amplitude at equally spaced moments in time, where each measurement constitutes a sample.

Answer 14

Sampling

Question 15

is the number of times the analog sound is taken per second.

Answer 15

sampling rate

Question 16

is a process of representing the amplitude of each sample as integers or numbers. How many numbers are used to represent the value of each sample known as sample size or bit depth or resolution

Answer 16

Quantization

Question 17

converts the integer base-10 number to a base-2 that is a binary number. The output is a binary expression in which each bit is
either a 1(pulse) or a 0(no pulse).

Answer 17

Encoding

Question 18

is a method or technique for transmitting
analog data in a digital and binary way independent of the complexity of
the analog wave form. All types of analog data like video, voice; music
etc. can be transferred using PCM. It is the standard form for digital
audio in computers.

Answer 18

Pulse Code Modulation (PCM)

Question 19

Removing dead air or blank space and so on. Done using commands
like cut , clear , Erase, Silence.

Answer 19

Trimming:

Question 20

Removal of extraneous noise , touch up, creating a
longer recording by mixing many small recordings.

Answer 20

Splicing and Assembly:

Question 21

when we combine one or more recording with different
volume level, they must be made to run with a consistent volume level. We need
to normalize it with a sound editor to a particular level.

Answer 21

Volume adjustments:

Question 22

While saving different formats are made available for
sounds. Data may be lost during conversion. Ex. MP3,MP4

Answer 22

Format Conversion:

Question 23

: if we have sound recorded and edited the
sound at 16 bit sampling rate and using lower rates then RS & DS is necessary, as
we may save lots of disk space.

Answer 23

Resampling and down sampling

Question 24

useful for sections that requires this effect. This enveloping
helps to smooth out a beginning and end of the sound file.

Answer 24

Fade in & Fade out:

Question 25

allow us to modify a recordings frequency content so that it sounds brighter or darker.

Answer 25

Equalization:

Question 26

allows to alter the length of the file . Useful but may degrade audio quality of the file.

Answer 26

Time Stretching:

Question 27

allows signals with reverberation, multi tap delay, chorus, flange and other special effects using DSP routines.

Answer 27

Digital Sound Processing:

Question 28

: Reversing or a part of a recording.

Answer 28

Reversing Sound

Question 29

Being able to edit and combine multiple tracks, merge tracks and then export them in a final mix to a single audio file is important.

Answer 29

Multiple Tracks:

Question 30

are programs that compress data for transmission and decompress that data on the receiving end.

Answer 30

Audio Codecs

Question 31

is the most popular of the lossy formats. _____ work on most devices, and the files can be as small as one-tenth the size of lossless files.

Answer 31

MP3 (MPEG-1 Audio Layer III)

Question 32

take up very little space and are good for streaming, especially over mobile devices. Requiring less than 1 MB per minute of music and sounding better than MP3 at the same bitrate, the AAC format is used by iTunes/Apple Music, YouTube, and Android.

Answer 32

Advanced Audio Coding, or AAC files (also known as MPEG-4 AAC),

Question 33

is the free, open-source audio codec that Spotify uses. It’s great for streaming, but the compression results in some data loss. Experts consider it a more efficient format than MP3, with better sound at the same bitrate

Answer 33

Ogg Vorbis

Question 34

offers lossless compression, and it’s free and open-source.

Answer 34

Free Lossless Audio Codec (FLAC)

Question 35

allows for lossless compression, but it works only on Apple devices

Answer 35

Apple’s Lossless Audio Codec (ALAC)

Question 36

(filename extension .ape) s slightly better to compress files than FLAC and WavPack, but it requires more processing power.

Answer 36

Monkey's Audio

Question 37

(filename extension .wv) is a free and open-source audio compression format under the BSD license. In addition to the lossless compression, it has a “hybrid” where it creates two files: a high-quality, lossy file (.wv) that can be used stand-alone, and a "correction" file which, when combined with the lossy file, provides full lossless restoration.

Answer 37

WavPack

Question 38

retains all the original data, which makes it the ideal format for sound engineers. It can be 24-bit, 32-bit, all the way up to 192kHz sample rate and even higher these days. WAV holds its time code if you’re collaborating and sending files back and forth.

Answer 38

WAV (Waveform Audio File)

Question 39

Originally created by Apple, _______ files are like WAV files in that they retain all of the original sound and take up more space than MP3s. They can play on Macs and PCs, but they don’t hold time codes, so they’re not as useful for editing and mixing.

Answer 39

AIFF (Audio Interchange File Format)

Question 40

is an uncompressed, high-resolution audio format. These files encode sound using pulse-density modulation. They are very large, with a sample rate as much as 64 times that of a regular audio CD, so they require top-of-the-line audio systems

Answer 40

Direct Stream Digital (DSD)