Built for producers and mix engineers who are one bounce away from release.
Sounds finished in the room.
Does it survive everywhere else?
Upload a bounce. In about a minute, MixLens scores it against every platform you’re shipping to — Spotify, Apple, YouTube, club — and hands you the exact EQ, comp, and limiter settings to fix what doesn’t translate. Preview any change in the browser before you render.
Analysis is free forever. 3 corrective renders / month included on Free.
Score, diagnostics, before/after, and audition the fix — on a real mix.
Files compute your score, then delete on schedule. Analysis stays.
ITU-R BS.1770-5, 4× true-peak, published streaming targets.
Same input, same output. No model in the chain.
A second set of ears for the moments your room lies to you
No mystery AI. Every issue is tied to a metric, a rule, and a fix you can actually use.
Ready / Almost / Needs work — for Spotify, Apple, YouTube, and club PA. Same mix, scored against each platform’s actual spec.
“The bass disappears on phones.” “The kick gets boxed in.” “The master will clip after encoding.” No mystery AI; every flag traces to a measured number.
Each finding ships with the parametric settings — bell freq, comp threshold, limiter ceiling — so you can punch them into your own DAW or auto-render in one click.
Audition any chain on a 10-second slice in the browser before rendering a full master. Toggle steps, hit Preview, hear the result.
Upload a track that sounds right and we’ll EQ-match toward it. No reference? We fall back to the published curve for your genre.
We don’t train on it. We don’t sell it. We don’t fingerprint it. Audio files are deleted by default after retention, while your analysis rows stay in your account history.
The stuff that ruins a release when nobody catches it early
The bass vanishes on a phone. The low end collapses in mono. The limiter starts shaving off the punch. The mix sounds big in the room and suddenly thin, harsh, or distorted everywhere else.
MixLens turns those failure points into plain-English diagnostics, ranked by impact, with the exact corrective move attached. You see what is broken before you burn time on the wrong fix.
- → A calibrated score for every platform you’re shipping to, not one generic number
- → One card per problem — what fails, why it fails, the exact settings to dial in
- → Preview the chain in-browser, then auto-render a 24-bit WAV when you’re happy
Collapsed the bass to mono below 150 Hz so the kick survives phones and Bluetooth speakers.
Dropped the overshoot so AAC / MP3 encoding stops clipping the bounce.
Cleared the mud around 200–500 Hz so the vocal and kick stop fighting.
- Every warning has a receipt
Each diagnostic maps to a named metric and a published rule. No black-box AI; no guesswork.
- No training on your audio
Uploads are deterministic inputs to deterministic DSP — never training data. Audio files are deleted by default after retention, while analysis rows stay in your history.
- You stay in control of the mix
We diagnose by default. Corrective rendering is opt-in, per step, with full before/after.
Diagnostics first. Final polish second.
Automated final-polish tools are built to ship a louder file. MixLens is built to show you exactly why a mix might collapse on a phone speaker, in mono, or after codecs — while you still have faders left to touch. Plenty of producers use both: hear the competitive loudness benchmark, then use MixLens to chase down what still sounds wrong.
In other words: final-polish tools can finish the file. MixLens tells you whether the file itself is ready to survive outside your room.
A louder, polished bounce — upload in, finished file out.
Whether the mix will hold up everywhere else: phones, cars, clubs, mono playback, streaming codecs — before you call it done.
Mostly a black box: you hear a result, but not the reason it still breaks outside the room.
Plain-English diagnostics. Every warning maps to DSP we spell out — loudness, spectrum, mono low end, peaks, dynamics — not an opaque guess.
The algorithm is the final-polish engine — it picks compression, EQ, limiting, stereo width.
You stay in the DAW driver’s seat — we quantify issues, prioritize them, walk you through fixes, and only process audio when you ask for corrective steps.
Great when you want a finished file tonight and aren’t chasing a bespoke sound.
Ideal when your mix isn’t release-ready yet — or when you’re about to hire an engineer and want the homework done first.
Wire MixLens into the tools you already use.
Signed webhooks, a bearer-token API, a desktop CLI with a watch-folder mode, an MCP server that drops into Claude Desktop or Cursor, and a Discord relay you can fork. Producers stop refreshing the tab.
Drop a bounce. Get the score, the diagnostics, and the fix — before you ship it.
Free forever for analysis. Three corrective renders a month included. The file you upload is used only to compute your score and your fixes, then deleted on schedule.