MIX & MASTER / LONDON

Make every decision
audible.

A strong mix is about hierarchy, movement, emotion and translation. We work toward masters that hold together from phones to clubs.

COOL 9 / SERVICE / MIX

COOL 9MIX & MASTERLONDONINDEPENDENTCOOL 9MIX & MASTERLONDON

CHECK YOUR MIX / MASTER // BY COOL 9

Hear what the meters might be telling you.

Upload a WAV or MP3, choose the stage and genre, then analyse it privately in your browser. Your audio is not sent to COOL 9 for this check and is not retained by us.

PRIVATE ANALYSISAudio stays on this device

01 / AUDIO FILEDROP OR CHOOSE WAV / MP3Nothing is uploaded to our server.

02 / STAGE 03 / GENRE

Choose a WAV or MP3 to begin.

PRIVACY BY DESIGN

Decoding, measurements and preview processing happen locally in your browser. COOL 9 does not receive or store the audio file. Closing/reloading clears the analysis session. Uploaded audio is not used to train AI models.

HIGH-RES ANALYSIS REPORT

TRACK

—

—TECH CHECK

ENGINE48 kHz · 32-BIT FLOAT INTERNALGated loudness · 4× intersample peak estimate · 8192-point spectral profiling · genre-aware adaptive preview

INTEGRATED LOUDNESS—LUFS

RMS—dBFS

TRUE-PEAK EST.—dBTP

CREST / DYNAMICS—dB

STEREO WIDTH—%

CORRELATION—mono check

LOUDNESS RANGE—LU approx.

FREQUENCY BALANCE

PLAYBACK / DELIVERY REFERENCES

STREAMING / SPOTIFY≈ −14 LUFSPlayback normalisation reference. For louder masters, leave extra true-peak margin.

EU BROADCAST−23 LUFSEBU R128 programme reference; production true peak ≤ −1 dBTP.

LOUD MASTER CODEC CHECK≤ −2 dBTPUseful extra codec headroom when mastering substantially above −14 LUFS.

WHAT WE WOULD CHECK / HOW TO TRY IT

TRUST YOUR EARS. These measurements are technical guidance, not a verdict. Make the smallest useful change, bypass it at matched loudness, and keep it only if the music translates better.

REAL-TIME A/B PREVIEW

Original ⇄ Suggested

ORIGINAL is untouched. Switch to SUGGESTED to reveal the correction controls and audition our starting-point processing.

NEED US TO FIX IT? →

ANALYSIS COMPLETE · AUDIO NOT RETAINED BY COOL 9

COOL 9 // EXPORT OPTIONS

Choose your file.

Your source audio still stays on this device. The selected Suggested settings will be used for the export workflow once checkout is activated.

Permanent export metadata: Powered by COOL 9 · Mastered by Zizzo World

IMPORTANT

Export never adds detail that was not present in the source. A 44.1 kHz / 16-bit or MP3 upload can be processed into the delivery format, but it cannot become a true higher-resolution recording.

THE WORKFLOW

Detailed balance, clarity, punch and translation with a release-focused workflow.

Every enquiry is reviewed as a real project. Send useful context, a working link where relevant and the clearest picture of what you want the record to become.

Send context

Tell us what exists, what is missing and what success sounds like.

We review

Your request is stored securely; COOL 9 receives Telegram and email notifications.

We respond

You receive an automatic confirmation; suitable projects receive a human follow-up.

COOL 9

Music-first decisions. Clear communication. London base, worldwide enquiries.

Explore the rest of the signal

Mix & Master ↗ Distribution ↗ Submit Demo ↗

Make every decisionaudible.