The Mastering Manifesto

You must master your music before distributing it.

Getting your music online is the goal for artists of all success levels, but getting your music mastered is just as crucial. 

When you distribute a song through a digital distributor like TuneCore, you’re sending it to over 150 different streaming services and platforms. Each of them has a unique set of aural rules your song must adhere to. 

Mastering solves those issues.  Here’s how.

Your track needs to sound great everywhere

There are hundreds of ways fans can discover music – in the club, on a drive, while going for a run – and your music needs to sound amazing over PAs, car stereos, earbuds and wherever else it is being heard.

This is why streaming platforms have such strict aural guidelines and why mastering’s so important. 

A well-mastered track creates a consistent listening experience that sounds excellent on any system, anywhere. Without mastering, you may be optimizing your music for the room where you’re recording it, but you’re gambling on the rest.

Streaming platforms normalize your release.

When listeners listen to music on streaming platforms, they don’t want to adjust the playback volume on their phones or devices all the time if a quieter or louder song comes next. This is why streaming platforms automatically measure how “loud” your music sounds in advance, and adjust the playback volume automatically without you even noticing. 

This is called loudness normalization.

What this means for your audio files is that they’re going to be modified by streaming platforms, no matter what shape you deliver them in. Because listeners are used to a certain dynamic “density”, good mastering makes sure that the loudest sections of a song typically sit between -8 to -10 LUFS. 

Mastering therefore helps with a consistent listening experience, and prevents your song from sounding too compressed or too dynamic compared to other songs.

Streaming codecs are unforgiving…and hi-fi tiers expose everything.

Spotify, Apple Music, YouTube and the rest re-encode your file to lossy formats like Ogg Vorbis and AAC. These codecs amplify flaws that already exist in your audio. 

The worse your master, the worse it will sound after encoding. Good mastering therefore gets rid of all the problems in your track that would cause even more problems down the line.

• Spotify Lossless and Apple Lossless stream at 24-bit/44.1 kHz FLAC. Every detail is on display. 

• A well-mastered track shines in that format and lets listeners immerse themselves in your music.

•  An unmastered one shows every weakness with brutal accuracy, preventing your listeners from enjoying the additional level of detail.

You Must Anticipate the Listeners and Curators

If you’re still on the fence about mastering, remember this: listeners hear amateur before they hear amazing. 

Streaming audiences are used to listening to professional-sounding songs. Leaving yours unmastered puts you at a disadvantage: the ski rate within the first 30 seconds is one of the strongest signals Spotify's algorithm measures, so a weak master translates directly into worse algorithmic reach. 

This means that a poorly mastered song never gets the chance to reach its full audience potential.

Catalog Cohesion Matters More Than You Think

When a listener clicks your artist page or lets your album, or catalogue autoplay, level and tone shifts feel jarring. Mastered releases sit together as one body of work, whereas unmastered ones make your discography sound like demos lined up next to singles. 

Good mastering fixes that by glueing everything together and giving your music a consistent sonic identity, so users can focus completely on your music.

The Curators Care About Mastering

Editorial and independent curators go through dozens of submissions a day. If your song lands next to a polished release and feels duller, thinner, or quieter, it loses momentum before they hear the chorus. Curators reach for what fits the soundscape they already trust, and an unmastered track rarely does.

This means an unmastered track might not get the promotional opportunities it could have gotten if mastered well.