how to start to understand digital audio, what are its differences from analogue and where to listen to music in good quality without overpaying?
/ disclaimer: this post does not contain advertising integrations or any paid opinions. this is my personal view of the situation and my own recommendations based on objective data. thank you all!
introduction
i have always loved music. when I was a kid, I had an old music centre in my room that could play CDs, cassettes and listen to radio stations. i hardly had any CDs or cassettes, so i listened to the radio. my favourite radio station was the one that played western popular songs and their remixes. danceable stuff, in general, hehehehe.
when i was in primary school, i saw someone at school with an mp3 player and asked my parents to buy me a similar one. and they bought me one! and headphones too. i found songs i liked on the internet and downloaded them from mp3 music catalogue sites. i often searched for songs from TV commercials and films on forums. however, my happiness didn't last long, because i successfully lost the player and headphones after a few months, and i cried for a long time about it.
ever since i got a phone — not just any phone, but a samsung galaxy star plus! — i learnt that people listen to music directly on the internet without downloading it. and my first ‘streaming service’ was the russian social network VKontakte, where for the time being music could be listened to absolutely for free (and for a while even without ads). i loved music in VK and for a long, long time listened to music only there. an interesting feature of the service was that you could upload your audio files in different formats and listen to them online, share them with friends in messages and attach them to posts in your feed. very cool. later, of course, all these core features that made people appreciate VK were abolished, and the platform became more and more profit-oriented. not good.
the year is 2025, and the number of popular (!) streaming services i know already exceeds the number of fingers i have. each of them, of course, i think, has its own target audience, but still i have a definite opinion about which of them are worthy of attention and which are not. i will explain sequentially.
☆ the era of digital audio
almost everyone is familiar with modern audio technologies. even my great-grandmother used to use a CD player and listened to albums on discs until she lost the player somewhere XD. however, few common listeners know the differences between formats and methods of recording and transmitting audio. and the differences really are.
the history of recording sound in digital — roughly speaking, electronic — format dates back to the period when there was no such thing as an ‘audio file’ at all. the first prototypes of digital recordings appeared in the early 60s, and consumer digital recordings began to be made in the late 70s of the twentieth century and circulated in the form of cassettes, CDs and, of course, vinyl records.
so what is the difference between analogue and digital recording? physics and mathematics can provide the answer. first i will try to explain it as simply as possible, without abstruse terms.
☆ the difference between analogue and digital
analogue, in simple terms, means that on a recording you get the same analogous signal that was received through the microphone. a digital signal is a signal that is processed in a certain way and turned into a code — a set of digits (ones and zeros). this set of digits can be read by a computer and turned back into an electrical signal. the more digits a recording contains, the more detail the sound will have.
and for my mathematically savvy bros I will explain in more complicated and detailed way:
analogue data signal is a data signal, where each of the presented parameters is described by a function of time and a continuous set of possible values. digital signal is a signal discretised in time and quantised by level, and each of the levels is represented by a number, usually binary. the higher the sampling frequency and the bit rate of quantisation, the more information the digital record contains.
an analogue recording can only be stored on a medium that uses physical vibrations to record the signal — such as magnetic tape or a vinyl disk. a digital recording, on the other hand, is stored as a set of data that can be reconstructed into a close-to-original signal using a computer or a separate analogue-to-digital/digital-to-analogue decoder (AD/DA decoder) and then listened to directly from the machine or transferred onto physical media as well.
so, it turns out that an analog signal contains 100% of the details of the sound that is being recorded, but in a digital signal this conditional percentage of details may be less, depending on how it was encoded. in digital recording processing, this process is called compression (but not to be confused with sound compression! this thing is different, i'll tell you about it in one of the following posts). compression is used both in digital audio processing and in digital image processing (photo or video). roughly speaking, when processing in digital, we can omit details in the original signal in order to reduce the amount of information and, consequently, the storage space occupied.
oh, i guess i'm being complicated again. to put it simply, in a digital recording we can remove some digits to save space in the device's memory. however the quality may suffer.
the codec (an abbreviation for the encoder-decoder pair, i.e. the algorithm that encodes and decodes the digital signal) is responsible for the way the digital signal will be processed, and the container (the familiar visible file extensions: .mp3, .wav, .jpeg, .gif, etc.) is responsible for the form in which it is stored.
usually codec and container are related to each other by some standard (like ISO-MPEG-Audio Layer III aka MPEG-3 Audio standard and its container .mp3), but there are also containers that work with many codecs.
there are two types of audio codecs (and audio files, respectively) — with and without compression. the first category (codecs with compression) is also divided into lossy and lossless formats. the latter are sometimes also called hi-fi (high-fidelity) audio. lossless formats' compression mechanisms allow preserving all details and bringing the sound closer to the original studio recording.
☆ the pain
of course, the coolest option for listening is the uncompressed audio format. however, the weight of such files can reach several hundred megabytes, so this option is not very suitable for streaming services — both for the listener, who would not benefit from spending such a large amount of Internet traffic, and for the streaming service, which would need huge, powerful and expensive servers to store such large amounts of information. and that's where formats with compression come into play — so here we come to the pitfall...
the problems of lossy formats are obvious: sound quality drops very badly when compression is high, some frequencies turn into mush, and the tonal balance of the recording changes. it would seem very simple, because the best option is to minimise compression and provide a streaming option in lossless, and then everyone would be happy. however, many companies manipulate their listeners by demanding even more money for improving the quality of the audio stream.
let's not go too far, let's take a look at Spotify. the pioneer of streaming doesn't offer lossless as an option at all, the maximum audio stream quality is 320kbps — the same as downloading a low-compression mp3 file to your phone. meanwhile, Spotify's premium subscription costs $12 for an individual plan. yes, their pricing varies from country to country, but in any case it's objectively very expensive, considering that other services offer better stream quality for less.
☆ and what are the better options?
i've been using Apple Music since 2019. the subscription used to cost $6/mo but has now gone up to $11/mo. however, for some regions the price is still the same or has not gone up as much. for less than Spotify Premium, you get ALAC (Apple Lossless Audio Codec) lossless streaming with studio-quality sound, personalised recommendations, exclusive features (Sing, Dolby Atmos, Apple Digital Masters), and all the same features found in Spotify. you can find almost the same features on Amazon Music Unlimited for the same $11/mo, and for Android users, this service will be even more convenient.
☆ concluding:
in general, what i want to say is that there are better offers than Spotify on the streaming services market, and it makes sense to think about changing services if listening to music is an important part of your life. and there are special apps for transferring your media library between services (e.g. Soundiiz, Free Your Music, SongShift, and many others), so it's not a problem at all.
i sincerely hope the post didn't turn out ultra-mega-boring and you enjoyed it.
thank you so much for reading! add me to friends list and subscribe to the blog, i'll tell you many more interesting things ;3
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love. web. aevii ! ☆
Comments
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str("astro rocket")
this was such a cool read!!!! i feel so educated :p my biggest motivator for switching from spotify is their low pay for artists. ideally, i'd love to listen exclusively to physical media (i luv cds!!!) but it gets kind-of impractical (and, sometimes, i just wanna shuffle a playlist instead of choosing an album).
also, i hadn't thought of using my blog as a place to post essays!!! this is such a cool format
by str("astro rocket"); ; Report
thank you sm!! <3
by aevii; ; Report
Naburgondux
i prefer downloading all my songs,i dont deal with ads and i will always have them for free,althought some may like the convenience of just clicking a button to listen instead of downloading all of it.
that's cool! but unfortunately it doesn't suit everyone. for example, i have a media library of more than 8000 saved songs, and it would be unrealistic to download absolutely all of them to my phone in a satisfactory quality for me. that's why i use streaming services and that's why this post is now here he-he
by aevii; ; Report