FADE PUSH — Mix Engineer

GETTING THE BEST FROM REX

01 — GIVE REX A BRIEF

REX is an engineer, not a button. The more direction you give him before hitting MIX, the better the result. Tell him:

Genre & vibe — "Trap, dark and heavy" or "Lo-fi hip-hop, warm and intimate"

Reference — "Like a Travis Scott record" or drop a reference track using the REF button

Destination — "Going on Spotify" or "for the club" tells REX exactly how loud and wide to push it

Problem — "The vocals feel buried" or "the low end is too muddy" gives REX something to fix

02 — WHAT TO SAY

These are real things you can type to REX:

"Trap beat, going on Spotify. Make the 808 knock and keep the hi-hats crispy."

"R&B, warm and smooth. The vocals need more presence without sounding harsh."

"Match the energy of the reference track I uploaded. It should feel that wide and that loud."

"The kick isn't hitting hard enough and the bass is fighting it. Fix the low end."

"House music. Big room energy, going on Tidal. Wide and punchy."

03 — REVISE, DON'T START OVER

After REX delivers a mix, play it back and tell him exactly what's wrong. He remembers what he did and makes surgical adjustments — he doesn't rebuild from scratch.

"The vocals are still a bit buried. Push them forward and add a bit more air."

"The low end is perfect but the top feels harsh. Just fix that."

"Make it a bit wider and bring the reverb down slightly."

04 — POWER TIPS

🎯 Use a reference track. Drop a professional mix you love into the REF slot. REX will analyse its loudness, frequency balance, and width — then aim for the same.

📻 Name the platform. Spotify, Apple Music, YouTube, and the club all have different loudness standards. REX knows them all and will hit the right target automatically.

🎚️ Label your stems correctly. In stems mode, REX uses the stem type (kick, bass, lead vocal, etc.) to make mix decisions. A correctly labelled session gives REX everything it needs.

💬 Talk to REX before you mix. Chat with him first — describe the feeling you want, ask what he's hearing in the analysis. The brief you build in conversation becomes the mix.

Meet REX,
your mixing engineer.

REX is a mixing and mastering engineer who lives in your browser. Drop your audio, tell him what you're going for, and he handles the whole mix: EQ, compression, dynamics, reverb, stereo image, and loudness — all calibrated to your genre.

No DAW. No plugins. No install. Just audio in, professional mix out.

🎚️

What are stems?

Stems are the individual tracks of a song — each instrument or group exported as its own file from your DAW. REX gets a much better mix when he can work with each element separately.

Drums

Bass

Vocals

Keys

Pads

Don't have stems? Use Single Track mode — drop in your full mix and REX will work with that. Or hit ✂ SPLIT INTO STEMS and REX will separate your track automatically before mixing. For best results, use the cleanest, least processed version of your audio — the source quality directly affects how clean the stems come out.

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How it works

Drop your stems (or a single track) and pick your genre

Tell REX what you're going for in the Mix Brief or just chat with him

REX analyzes the audio and applies a full professional mix — EQ, compression, dynamics, width, reverb

Preview, tweak with faders, or send REX back in with revision notes — then download

🔑

You'll need an API key

You're in. As a FADE PUSH beta tester, REX is fully activated and ready — no setup required. Just drop your audio and let him work.

Beta access is completely free — no credit card, no account needed

Drop your track, tell REX how you want it to sound, and he handles the rest

Your feedback shapes the final product — we want to hear everything

Your key is stored locally in your browser only and never shared with anyone.

🎶

Ready to mix?

REX is standing by. Drop your stems, pick your genre, give him a brief — and let him work.

Hit ? in the top bar any time to revisit this guide.

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DROP YOUR TRACK

MP3 · WAV · FLAC · AAC

INPUT LEVELS

PEAK L

—

PEAK R

—

RMS

—

HOW ARE WE MIXING TODAY?

🎵 SINGLE TRACK

Got a full song or rough bounce? REX mixes or masters the whole track — EQ, compression, stereo width, loudness. Ready in seconds.

🎚️ STEMS SESSION

Drop your individual tracks — kick, bass, vocals, keys, pads. REX builds the full mix from scratch, stem by stem, bus by bus.

01DROP YOUR AUDIO — any format. No DAW required, no install, no plugins.

02BRIEF REX OR LET HIM COOK — tell him the vibe in plain English, or hit Let Rex Cook and he decides everything from the audio data alone.

03MIX, MASTER, OR BOTH — mix your stems into a full track, master a finished mix for streaming, or run both in one session.

04DOWNLOAD YOUR MIX — WAV or MP3, platform-ready, ready for distribution.

REX

· MIXING ENGINEER

Ready — load a track or stems to begin

◈ DROP OR CLICK TO ADD A REFERENCE TRACK

◈

DROP REFERENCE TRACK

Select a mode and drop your audio. REX handles everything from there.

REX // MIXING ENGINEER

What's good. Drop whatever you've got — a full track, rough mix, or a whole session of stems. Two ways to work: talk to me about the vibe, genre, who you're trying to sound like — that's your brief, and I'll build the mix around it. Or just hit Let Rex Cook and I'll read the audio data and decide everything myself. Either way I've got EQ, compression, dynamics, stereo image, reverb, mastering — the full chain. Drop the audio and let's get into it.