get your 160k Aug vorbis on Spotify get
your 256 AC on iTunes get your lossless
Flack on title well if you're one of the two dozen people that has a title
subscription that is boy if you're into music it might seem like there are just
way too many audio formats to choose from can't we all just use MP3 no no we
can't there's a very good reason for all of the madness different audio formats
make things more optimized for different types of users electronic music artists
home theater enthusiasts or just straight up bass
heads let's start by looking at common formats used by average listeners MP3
AAC and vorbis these all store audio
using lossy compression which means these formats are often defined by the
fact that they discard some information from the original audio Source well hold
on now is is that like an MP3 of Don't Fear the Reaper doesn't include the
cowbell I got to have more cowbell not exactly you see most people simply can't
hear much of the information in the uncompressed audio files you'd find on a
retail CD we're talking sounds that are
so low in volume so high in pitch or so
close in time to other sounds that the vast vast majority of people can hardly
perceive them so lossy formats just cut them out
oh and they also save space by using a different bit rate you see when a song
gets digitally recorded in a studio the recording equipment takes samples of the
analog sound waves coming out of a guitar or a singer's mouth and stores
them as digital bits just standard ones
and zeros on an uncompressed CD the audio you hear is typically stored at a
bit rate of 1,411 kilobits per second but lossy
compression discards a lot of these bits to make the file often many times
smaller for example a 4minute uncompressed song that takes up about 42
megabytes would only be about 8
megabytes as a relatively high quality 256 kilobits per second MP3 and although
MP3 is probably the most familiar lossi
format others are widely used for different reasons such as AAC which
pitches higher quality at lower bit rates due to to a fancy compression
algorithm and Aug vorbis which is completely open source and patent-free
unlike MP3 but some folks aren't satisfied with the level of quality you
get with lossi audio especially audio
files who want to get the most out of their high-end headphones and speakers
and instead they turn to formats like flak or AAC which offer lossless
compression these files contain all of the original audio data but with smaller
file sizes if that sounds like magic
it's not lossless compression is accomplished by looking for ways to more
efficiently store redundant data so this string would be expressed this way
instead and by predicting what sound
should come next lossless codec can store only the difference between the
predicted data and the actual data which takes up much less space and because
formats like flak and AAC are specifically designed for audio they can
compress sound Clips much more than general purpose compression schemes like
Zip in fact a typical audio file with
lossless compression will only take up about half as much space as an
uncompressed equivalent and if you're wondering about the difference between
flak and AAC you'll need to use the ladder if you want to listen to lossless
music in iTunes and yeah that's about it but
there are also other lossless codecs like Dolby true HD and D TSH HD Master
audio for both home theaters and commercial multiplexes that have proved
popular with movie studios so look out for these logos when you're out buying
Blu-rays if you're a home theater Enthusiast even more interesting is
Dolby Atmos which incord each sound in a movie soundtrack spatially meaning it
can scale to a huge number of speakers because the audio is mapped in space
instead of being coded for just one speaker you can learn more about that
right up here but despite the popularity of compressed formats keeping audio in
uncompressed form does have its advantages uncompressed files stored in
wave or AF format are not only compatible across a huge range of
devices because they undergo very minimal processing from the original
audio signal but they also contain all
of the information that was originally converted from analog to digital they're
easier for audio editors and creators to fine-tune as much as they'd like all of
that being said at the end of the day if you just like listening to music pick a
format that you think sounds good or whatever the format the music already
comes in and be sure not to judge other people too harshly because their library
is full of 128 kilobyte rips from
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