Your track is finished. The video for it isn't — and every visualizer
worth using either costs money or stamps a watermark on your upload.
Point it at any audio — your mic, a music file, or a browser tab — and watch it move. Retro screensaver energy, fully customizable, fullscreen. Free, nothing uploads.
01Give it soundMic, a music file, or a browser tab. Nothing uploads — it all runs in this page.
02Pick a lookTap a look and a colour palette below. 🎲 Surprise me rolls a whole new one.
03Then tweak, or don'tEverything below the looks is optional — stack them, rotate them, mirror them, or export a video.
▶ Pick an audio source below
Use your microphone, drop in a track, or share a browser tab's sound. The visuals react in real time.
Tired of the watermark?
Hand over your email and the Neon sun comes off for good on this browser — plus the
12-sound DreadScape sampler, royalty-free and yours to ship.
Chrome adds its own “sharing this tab” bar — every site that captures audio gets one and
no page can hide it. Two ways past it, both one click:
⧉ Pop out window below opens the visuals in their own clean window, or
🎵 Play a file skips capture entirely if you have the track on disk.
Looks
Tap a look to switch it ● on, again to put it
↻ in the rotation, again to turn it off.⧉ folds that one look into the mirror.
the filled chip is what is on screen right now
Mirror
Layer strength60%
Rotation changes every8s
Change look on the beat, not a timer
How many rotating looks at once1
Fine tuning
How hard the picture reacts, and how it is drawn.
Sensitivity1.0×
Smoothing0.80
Trailsmed
Glowmed
Detail96
Motion0.20
Colors
Beat flash (bass-reactive pulse)
Cycle through palettes
Palette change
5s
Change every
Drag up or down · scroll · arrow keys
Make a video
Rendered frame by frame, so nothing drops. Pick the shape you are posting to first — Reels / TikTok is 9:16.
AspectWindow
Render size1080
Output frame—
to
Audio in video
Load a music file to export.
9:16 · 1080×1920 · 3–8s · no audio track · cross-dissolved so the loop has no visible cut.
The Neon Audio sun fades in and out over the visuals. Unlocking with your email removes it.
⚙ Advanced — branding, reactivity, MIDI
Branding — drawn on the visuals, and burned into any recording
Title
Subtitle
Corner
Reactivity — how the audio drives the picture
Auto-gain (quiet tracks still react)
Bass drivesScale
Mids driveSpin
Highs driveGlow
Modulation depth0.50
Performance / live
Auto-quality (drops detail if FPS sags)
MIDI controller — CC 1-8 drive the sliders
—
Help & troubleshooting nothing moving? start here
Nothing is reacting
The visuals only move while audio is actually playing. Check the source is running,
and that you picked one of the three buttons above — the canvas sits idle until you do.
“Tab / system audio” shared nothing
In the picker you must choose a tab and tick “Share tab audio”. Without that
tick the browser hands over video only and there is nothing to visualize. This path needs
a Chromium browser — Chrome, Edge or Brave.
The mic is hearing my speakers
That's deliberate. Echo cancellation, noise suppression and auto-gain are all switched
off so the visualizer sees the real signal, not a cleaned-up phone-call version of it.
Playing a track out loud into the mic is a perfectly good way to drive it.
Record live vs Export MP4 — which one?
⏺ Record live captures in realtime, exactly what you see, from any source
(Chromium only). ⬇ Export MP4 under “Make a video” renders frame by frame for a
clean, frame-exact file — it needs a music file loaded, and is unlocked with your email.
How do I get rid of Chrome's “sharing this tab” bar?
You cannot remove it from this page, and no site can — it is security UI, and a
browser that let a page hide “you are being captured” would be a browser with a bug.
The way around it is not to screen-share at all. On a Mac, install a virtual audio
device such as BlackHole (free), make a Multi-Output Device in Audio MIDI
Setup containing BlackHole plus your normal speakers so you can still hear things, set
that as the system output, then come back here, click 🎤 Microphone once to grant
permission, and pick BlackHole 2ch from the Input dropdown. No sharing bar,
no capture prompt, and it picks up any application — a DAW, a media player, a game —
not just a browser tab. On Windows the equivalent is “Stereo Mix” or VB-Audio Cable.
Using it in OBS
1. Pick your audio source — mic, a file, or Tab / system audio, which is the
easiest route for music from a streaming service. 2. Set the shape in Make a video above: an aspect (16:9, 9:16, 1:1, 4:5) and a
size (720p, 1080p, 1440p). The canvas is then sized to those exact pixels rather than to your
window, so what OBS captures is the shape you actually want. 3.⧉ Pop out window opens a bare full-bleed canvas with no controls on it. 4. In OBS add a Window Capture source and select that pop-out window. Crop if
you need to.
Keep this tab open — the controls here keep driving the popped-out window live. Capturing the
pop-out rather than the whole browser is what keeps your toolbar, tabs and bookmarks out of
the scene; Window Capture on the browser plus a crop filter works too, it is just more
fiddling every time you restart. Going the OBS route needs no email — the gate only applies
to saving a file out of the page.
A quiet track barely moves
Auto-gain is on by default and should catch it. If it still feels flat, raise
Sensitivity under Fine tuning.
Free download12 or 15 WAVs
Free sounds to visualize
Creature vocals, impacts, drones, stingers and UI, hand-picked from DreadScape. Same masters as the paid pack, no watermarks. Drop one into the player above, or straight into a game.
Neon Audio is one person in Las Vegas making royalty-free game audio by hand.
No AI in the audio, ever. If the tools are useful to you, the libraries are how they keep getting built.
DreadScape — Horror Sounds & Ambience
Every layer of a scare in one curated pack: creature vocals, impacts, drones & ambience, dark stingers, UI.
Not ready to buy? Get 12 free sounds by email —
hand-picked from DreadScape, same masters, cleared for commercial use.
QuestionsNeon Audio
Can I use the output in a video I publish or monetise?
Yes. There is no watermark and no licence attached to what you render — the visuals are yours to publish, monetise or hand to a client. The music you run through it is your own responsibility, as always.
Does my audio get uploaded anywhere?
No. The microphone, file and tab audio are all analysed in your browser and nothing is transmitted. There is no upload step and no server-side rendering, which is also why it keeps working if your connection drops.
How do I use it in OBS?
Click the pop-out button to open the visuals in their own clean window with no controls, then add a Window Capture source in OBS pointed at it. The pop-out is deliberately not gated — it is the same URL, so a lock there would be theatre.
Can I export a video file?
Yes, as MP4. Export unlocks with your email address and needs a Chromium-based browser such as Chrome or Edge, because it encodes with WebCodecs. Frames are rendered one at a time rather than screen-recorded, so the file is not affected by your machine stuttering.