Glowfi · Music visualizer for Mac

No setup

It just hears your Mac.

No virtual audio device, no routing, nothing to install alongside it. Glowfi listens to the Mac's own output and picks up players you open after launch.

Or point it at an input: a mixer, external decks or a microphone
Unplug that input and it falls back to the Mac's sound until it's back
The audio is analysed in memory, never recorded, saved or sent anywhere

The Ridges scene: spectrum ridgelines rising like mountains

Knows the music

Every screen on the same beat.

One shared analyzer finds the BPM, the bar, beat 1 and the drop. Every screen shows the same tempo, and the count carries on across scene changes.

Change scene every 16 or 32 bars, right on the first beat of the phrase
Or the moment the kick slams back in after a breakdown
Live BPM and bar.beat on the control strip

The Bars scene: a mirrored spectrum analyzer on a glossy floor

Built for gigs

Fullscreen, without stealing focus.

Put visuals on any monitor without ever taking focus from your DJ app. The control strip floats above everything, so it can never get trapped under a fullscreen screen.

A blackout key fades every screen to black, and back
If a monitor drops out, its visuals wait for it instead of jumping to your DJ screen
Your name or the event on the Marquee sign, the Teletext ticker and the VFD banner
A 30 fps mode for about half the GPU, with beats still tracked 60 times a second

The Ripples scene: spectrum contours flying out of a scope

25 scenes, all drawn in Metal

Oscilloscopes, spectrum analyzers, LED signs, teletext pages and synthwave sunsets. Each screen starts on a different one, and any you don't like can be switched off.

**Outrun**A neon road rushing to a striped sun

**Code Rain**Falling katakana and digits, film-style

**Teletext**Live pages, charts and a news ticker

**Aurora**Northern lights folding over a ridge

**Ribbons**A twisting bundle of thin neon lines

**Pixel Rain**One spectrum band per falling column

**Dual Scope**A bench oscilloscope with a kick counter

**Synthwave**A neon sun over an endless grid

**Vinyl**A big tilted record on a lit platter

**Bars**A mirrored analyzer on a glossy floor

**Skyline**A pixel-art city under a striped sunset

**LED Meter**A 31-band LED analyzer with peak meters

**Deck**A DJ deck with beat grid and phrases

**Ripples**Spectrum contours flying out of a scope

**Pulse**An ECG monitor beating at the tempo

**Scope**A digital phosphor oscilloscope

**VFD**A 90s hi-fi vacuum-fluorescent panel

10 filters. 12 transitions.

Every scene runs through a filter: its own, a random one, or one you pick for all of them. Scenes cut, or change over 1.5 seconds in the same CRT, VHS and pixel style, with both scenes playing while it happens.

**ASCII filter**Teletext, typed out in characters

**LED Wall filter**Scope, on a dot-matrix wall

**Glitch filter**Scope, breaking up into blocks

**Terminal filter**Teletext, in green-screen phosphor

**VHS filter**Teletext, smeared onto tape

**Power Off transition**A CRT switching off to a line and a dot

**Glitch transition**One scene shattering into the next

One strip of controls

Pick which monitors show visuals, step scenes, change filter, set auto-change, black out, and watch the live BPM. Clicking it never takes focus from your DJ app.

The Glowfi control strip: screens, scene, filter, auto, colours, blackout, settings and BPM

→SpaceNext scene

←Previous scene

CNew colours

FNext filter, every screen

BBlackout, or back

LStop or resume auto-change

ReturnFullscreen the preview

EscTurn this screen off

Platform: Mac with Apple silicon
Requires: macOS 14.2 or later
Listens to: The Mac's own sound, or any input
Screens: Any monitor, plus a preview window
Graphics: Metal, 60 or 30 fps
Privacy: Audio never recorded or sent