Audio

 

Audio:

Audio in multimedia isn't as common in presentations but in video it's extremely important. Audio on it's own is also very important and there's many different formats of audio depending on usecase.

Audio can come in two main classifications of compression, Lossless or lossy. Lossless is compressed without perceivable loss of information. Lossy usually limits the dynamic range of audio and losses of information are usually perceivable. Bit rate and sample rate also effect audio quality. Sample rate is how frequently often data is sampled per second and bitrate is how much data is stored per sample.

Different compression codecs can also result in a better perceived audio for example the OPUS codec is commonly used for voice audio. YouTube and discord use the OPUS codec.

Lossless:

FLAC (Free Lossless Audio Codec):

FLAC is a very common lossless audio format. The most common format that I've personally seen is 16bit Flac (the frequency varies quite a lot)

 

WAV:

 WAV is technically not a compression type as its usually the raw format for most recordings. I don't typically use WAV as files can get really large.

Lossy: 

MP3:

MP3 is one of the oldest formats and its quality is quite poor. The typical bitrate is usually from 96kbit/s to192kbit/s however they can range from 32kbit/s to 320kbit/s.