Major Sound Quality Update: Accurate Loudness, Cleaner Bass, Honest True Peak

In July we shipped the deepest mastering engine update in Magic Master's history. It started with your feedback — especially the "too quiet" and "muddy" reports. We went from research (ITU and AES standards, Apple and Spotify documentation, patents) to a full audit of our DSP code. Here is what changed.

Loudness now hits the target

We found an architectural bug: loudness normalization sat in the middle of the chain, and the modules after it (stereo imager, reverb, genre EQ) shifted the final level. On some tracks the output came out 2–3 LU quieter than declared. The final normalization now sits where it belongs — at the end of the chain: choose −13 LUFS, get −13.0 LUFS.

Cleaner bass and low mids

Inside the multiband dynamics, each band was capped by an instant hard clipper — on dense material this added harmonic grit you heard as "dirt" or "mud". Each band is now handled by a real limiter with an envelope: measurements show distortion down by at least 3 dB, and by 10 dB on parallel compression. Compressor timing is fixed too: bass no longer pumps in time with the notes.

Genre presets now work at full strength

The audit revealed something awkward: some modules promised by genre presets never ran on the main processing path, and their implementations had defects. We brought everything back — fixed:

• Subharmonic synthesis (trap, hip-hop, EDM) is now generated one octave below your track's actual bass, not a fixed 50–60 Hz tone that could clash with the key.
• Parallel compression became real envelope-based compression — density without distortion.
• The de-esser got a working threshold tied to the mix level and finally tames sibilance.
• Compression intensity differs by genre again: EDM gets denser, jazz and classical breathe.

Honest true peak and codec verification

We switched to 8x oversampled inter-sample peak measurement (per ITU-R BS.1770-5 it is 4 times more accurate than the standard minimum). And after exporting to MP3, AAC or OPUS, the service now decodes the file back and measures its real peak and clipping — because codecs raise peaks, and Apple explicitly warns about this in the Digital Masters guidelines. No online mastering service we know of shows users these numbers.

A mastering passport

Every job now gets a tonal analysis of the result: four spectrum zones compared against a reference curve built from AES research on 12,000+ commercial tracks, plus detectors for common problems — mud, boxiness, harshness, dullness. The data is already in the API and will appear in the UI soon.

Also: OGG/OPUS upload fixed

OGG and OPUS files were decoded at the wrong scale. If you uploaded such files and the result sounded odd — try again, it is correct now.

All of this shipped safely: every change went through an automated A/B gate (byte-exact comparison, octave-band spectrum analysis, 260+ tests) and can be rolled back instantly. Keep sending feedback with the 👍/👎 buttons after mastering — the July update literally started with one of your dislikes.

Try the updated engine: magicmaster.pro/app — 3 free masterings per day after signing up.