Mastering is the very last step of music production. It comes after mixing, when all instruments and vocals are already in place. Its role is to take that final mix and polish it so it sounds perfect on every listening device: studio monitors, headphones, earbuds, Bluetooth speakers, car stereo. A mastered track sounds cohesive, balanced and professional, regardless of the playback device.

Mixing works on each track individually: the vocal volume relative to instruments, reverb on the snare, guitar panning. Mastering works on the final stereo file — the complete mix in a single file. It adjusts the overall EQ, controls dynamics, manages stereo width and ensures the volume is calibrated for streaming platforms. They are two complementary but distinct disciplines.

Every streaming platform — Spotify, Apple Music, YouTube, Tidal, Amazon Music, Deezer, SoundCloud — applies automatic volume normalization. If your track is too loud, the platform turns it down and it loses its energy. If it's too quiet, it seems dull next to other tracks in the playlist. Proper mastering targets the optimal loudness level for each platform, while preserving the dynamics and transients that bring the track to life.

AI mastering analyzes your audio file in depth — frequency spectrum, dynamics, stereo, sibilance — and automatically applies the necessary processing. Where a traditional mastering engineer charges tens or hundreds of euros per track with a 24-72 hour turnaround, AI mastering delivers a professional result in seconds. It's the ideal solution for beatmakers, independent artists and producers who want a competitive sound without breaking the budget.

When you upload a file to NKSounds, our engine performs a complete signal analysis then applies a professional processing chain adapted to your music genre: frequency balance correction, gentle dynamics control through compression, transient enhancement so kicks and snares hit harder, stereo processing for width, removal of harsh sibilance, and finally transparent limiting that optimizes volume for streaming without crushing the signal. All for €9.90 per track, no subscription.

Our engine uses the same techniques as a professional mastering engineer: corrective EQ, gentle compression, transient shaping, transparent limiting. For the vast majority of productions — instrumentals, beats, singles — the result is comparable to a studio mastering session. For very specific projects like an orchestral album or vinyl release, a human engineer is still recommended.

No. Mastering is done entirely in your browser. Your file never leaves your device. We have no access to your music. This is the most confidential online mastering service on the market.

WAV, MP3, FLAC, OGG, AIFF. For the best result, upload an uncompressed WAV file. The mastered file is exported in high-quality WAV, ready to distribute on all platforms.

Subscriptions lock you into paying even when you're not using the service. At NKSounds, you only pay when you master a track. No subscription, no commitment. If you master 10 tracks a month, that's €99 — still cheaper than a mastering engineer.

Yes! You can listen to a 1-minute preview of the master, compare it with the original in A/B, and change the intensity as many times as you want. You only pay when you decide to download the full file.

Spotify, Apple Music, YouTube, Tidal, Amazon Music, Deezer, SoundCloud. The engine targets each platform's loudness standards. You choose the intensity (Subtle, Standard, Intense) and the recommended platforms are indicated.

Mastering is nearly instant. After uploading your file and choosing the music genre, the result is available in seconds. You can immediately listen, compare with the original, and adjust the intensity.

Yes. The engine offers 8 optimized presets: Hip-Hop/Trap, R&B/Soul, Pop, Afrobeats, EDM/Electronic, Rock/Metal, Acoustic and Jazz/Classical. Each preset automatically adapts the processing parameters to the selected genre for a cohesive result.