Synesthesia alternative

Vibresia vs Synesthesia: the free alternative for watching music at home

By Syd Lawrence, a visual artist and developer who makes Vibresia. Facts last checked 2 November 2026; updated 2 November 2026.

If you want visuals for your own music on a Mac, Vibresia is the better fit: it's free with every feature, it listens to whatever the Mac is playing, and a new scene is one function or a sentence to an AI assistant. Synesthesia costs US$199, one-time for a licence, and it earns that on stage: if you perform live and need MIDI, OSC or video outputs, pick Synesthesia. We make Vibresia, so check our reasons against the sources at the bottom.

	Vibresia	Synesthesia
Price	Free, every feature	US$199, one-time (Standard), US$399, one-time (Pro)
Free version	The whole app, no watermark, no account	Free and unlimited, no sign-up; video output carries a Synesthesia watermark.
Runs on	macOS 14.2 or later, Apple silicon	Mac, Windows
Built-in scenes	18, and Auto Scan moves through them on the beat	80 built-in scenes and an in-app marketplace with more
Making your own	One GLSL function, or describe it to an AI assistant	Write your own scenes in a built-in live-coding environment, or import Shadertoy and ISF shaders
Live performance	Not built for it: no MIDI mapping, OSC or video outputs	MIDI and OSC mappable controls for live performance; Syphon, Spout and NDI to work alongside other VJ software, and output to projectors or livestreams
Licence	Open source (MIT)	Paid licence that never expires

Pick Vibresia if

you want something beautiful moving to Spotify, Apple Music or a film on your own Mac, you'd rather not pay for it, and you'd like to make your own scenes by writing one function or asking an AI assistant.

Pick Synesthesia if

you play live. Synesthesia has mappable MIDI and OSC controls, Syphon, Spout and NDI on the Pro licence, and it runs on Windows as well as a Mac. Vibresia has none of those.

Vibresia, reacting to whatever the Mac is playing.

Try Vibresia free with what's playing nowFree, no account, macOS 14.2+ on Apple silicon.

Why Vibresia is the better pick at home

Synesthesia is built for people who put visuals in front of a crowd. Its own site describes it as live music-visual software for DJs, VJs and streamers, and the licence is priced for that work. If you only want visuals while you listen, most of what you'd be paying for is the performance side: the mapped controls, the video outputs, the second computer on the Pro licence.

Vibresia is built for the other job. It listens to the Mac's system audio, so it reacts to Spotify, Apple Music, a browser tab or a film with no plug-in and no routing. It analyses the music on the Mac, picks out the beat, the bass, mids and treble, and notices when the track changes. Open it, allow system audio once, and it plays.

It's also free in the plain sense: every feature, no trial period, no watermark, no account. The code is open source under the MIT licence, so you can read how it works.

What it costs over a year

Say you want visuals on a second screen while you work, or on the TV at a party. With Synesthesia's free version you can do that, with its logo on the output (its pricing page says the trial is unlimited, and video output carries the watermark). To remove it, a Standard licence is US$199, and Pro is US$399. Both include a year of updates, and the licence itself never expires.

With Vibresia the same year costs nothing, and there's no watermark to remove. That's the whole of the price comparison, and it's the main reason to choose Vibresia if you don't perform.

Making your own scenes

Both apps let you write visuals. Synesthesia has a built-in live-coding environment, and it imports Shadertoy and ISF shaders, which is a real strength if you already have shaders you like.

Vibresia makes the first one easier. A scene is a single GLSL function, vec3 render(vec2 p, float t), with the music's levels, beat and spectrum already worked out for you. The app compiles it, shows it, and explains errors in plain words before it saves. And if you'd rather not write code, an AI assistant can write one from a description: Vibresia ships a local MCP server that can write, compile, preview and save a scene while it listens to what's playing.

Where Synesthesia is the better choice

If you're playing a set, use Synesthesia. It has MIDI and OSC controls you can map for performance, works alongside other VJ software over Syphon, Spout and NDI, and outputs to projectors and livestreams. Vibresia has no OSC, no Syphon, Spout or NDI output, and no controls built for a set.

Synesthesia also runs on Windows, and its homepage lists 80 built-in scenes with an in-app marketplace for more. Vibresia is Mac only, needs macOS 14.2 or later, Apple silicon, and has 18 built-in scenes, so if you have an Intel Mac or a PC, Synesthesia is the one of these two that will run.

Questions people ask

Is there a free alternative to Synesthesia?

For watching your own music on a Mac, yes: Vibresia is free with every feature and no watermark. For live performance, Synesthesia's free version works without time limit, with its logo on the video output.

Can Vibresia replace Synesthesia for VJing?

No. Vibresia has no MIDI mapping for performance, no OSC, and no Syphon, Spout or NDI output. It's a visualiser for listening, not a VJ tool.

Does Vibresia work with Spotify?

Yes. It listens to the Mac's system audio, so it reacts to Spotify, Apple Music, a browser or anything else that plays sound, with no plug-in.

Can I use Shadertoy shaders in Vibresia?

Not directly. A Vibresia scene is one GLSL function, so a Shadertoy shader needs adapting. You can ask an AI assistant to do the adapting.