Hi, this is Wayne again with a topic “Audio File Formats – MP3, AAC, WAV, FLAC”.
Get your 160 K forbus on Spotify, get your 256 AAC on iTunes, be lossless FLAC on title. Well, if you’re one of the two dozen people that has a title subscription, that is, if you’re into music, it might seem like they’re 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 that, like an mp3 of don’t fear, the reaper doesn’t include the 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 volumes so high. In pitch are 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 bitrate. 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 singers 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 1411 kilobits per second, but lossy compression discards. A lot of these bits to make the file often many times smaller. For example, a four-minute 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 lossy format, others are widely used for different reasons such as AAC, which Pitches higher quality at lower bit rates due to a fancy, compression algorithm and OGG 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 lossy audio, especially the 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 a lack 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 codecs can store only the difference between the predicted data And the actual data which takes up much less space and because formats like flack and a lack 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 flack and a lack you’ll need to use the latter. 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 DTS 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 enthusiasts even more interesting, is Dolby Atmos, switchin quartz 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 an uncompressed form does have its advantages. Uncompressed files stored in wav 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 YouTube racing against the clock? Is a freelancer challenging yes, but with the growth of the Internet, there’s never been more opportunities for these self-employed to meet.
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