What does it do?
In simple terms: it makes music sound less stuffy and more spacier. It separates vocals and individual instruments so you can hear everything clearly. The music is quieter and more balanced, like the old CD releases were. It eliminates clipping, i.e. noise caused due to excessive loudness.
In technical terms: it undoes the effects of compressors/limiters and restores lost dynamic range. You get a clean, quiet master.
Examples
Note: For a fair comparison of the dynamic range improvements, all examples are normalized to -14 dB LUFS - they have the same volume. Remastera's actual output will be the same but quieter.
The easiest way to tell the difference is to pay attention to heavy instruments like drums.
1. Purple Stain - Red Hot Chilli Peppers
One of the most notorious examples of loudness wars and bad mastering. Rick Rubin sure likes his compressors.


Original:
Remastera:
2. Aasa Kooda - Sai Abhyankar
Focus on the instruments. In the original, all the instruments "cut off" at a certain point. In Remastera, the instruments sound natural. The lost decay is recovered.


Original:
Remastera:
3. Style - Taylor Swift
Taylor Swift's discography is notorious for having very low dynamic range. It's loud and has bad separation of instruments. Remastera works wonders with her music.


Original:
Remastera:
4. No Love - Eminem ft. Lil Wayne
A classic. This clip in particular has a 2x PLR increase. Don't let me tell you though, just give it a listen.


Original:
Remastera:
FAQ
What is PLR?
PLR stands for Peak-to-Loudness Ratio. It compares the loudest parts of a track to the average loudness. PLR values correlate with dynamic range, but it's not a direct measure. Sometimes, PLR is higher/lower than the actual dynamic range. To measure dynamic range, you can use Foobar2000's Dynamic Range Meter component.
Which music player should I use?
Anything. One thing to keep in mind is ReplayGain. Remastera tags all the remastered files with EBU R128 ReplayGain tags. If you want loudness normalization, all you have to do is turn on ReplayGain in your music player.
I'm an artist, can I use Remastera to improve my masters?
Absolutely! If you're an indie artist, send me your Spotify page and I'll gift you free credits. :D
Contact
You can reach out to me on X/Twitter or mail me at wadegrimridge@gmail.com.