Why is my overlay not moving with the music?

The dashboard does the listening. Check that audio is on and the dashboard tab is still open, since it can be minimised but not closed, and that Listening to is set to the source your music actually comes from.

What does each part of the music do?

The bass drives the zoom, speed and glow, the mids reshape the pattern itself, and the treble makes the colour more vivid and widens the colour split. A separate detector watches for kicks and sends a pulse on each one.

Can I make it react more or less?

Yes. Audio Sensitivity in the dashboard sets how strongly it responds. Lower it for calm streams, raise it for quiet music.

Is it a transparent overlay?

No. Vortexia draws a solid frame, and most looks are a glowing field around a dark shape, so they work best below your camera and game. For a true overlay, choose a look with dark space such as Bass Tunnel, right-click the source in OBS and set Blending Mode to Screen: the black drops away and the bright parts glow on top.

Yes. The free plan streams at 720p and 30fps with a small watermark, three engines and Twitch. Plus removes the watermark, renders at 1080p and 60fps, unlocks all eight engines and adds automatic YouTube and Kick events.

AUDIO-REACTIVE VISUAL · UPDATED 2026-09-28

An Overlay That Actually Hears Your Music

Name: Vortexia
Author: Vortexia

Bass, mids and treble each move it, and every kick lands a pulse

How a music-reactive overlay hears your stream: bass, mids and treble drive the motion, every kick lands a pulse, and one slider sets how hard it reacts.

Open the dashboard · Watch it live · All presets · Pricing

What is An Overlay That Actually Hears Your Music?

Vortexia is a free music-reactive layer for OBS and Streamlabs Desktop that splits your audio into three bands and gives each its own job. The bass pushes the zoom, speed and glow, the mids reshape the pattern itself, and the treble makes the colour pop, while a separate detector lands a pulse on every kick. Audio Sensitivity sets how strongly it responds, so a quiet acoustic stream and a loud EDM set can both look right. The listening happens in the dashboard: choose Microphone, or Music / system to capture your music directly in Chrome or Edge on Windows, and keep that tab open while you stream, minimised is fine. Your OBS Browser Source shows the result. It draws a solid frame, so run it behind your camera and game, or blend a darker look such as Bass Tunnel over them with OBS’s Screen mode.

How to use An Overlay That Actually Hears Your Music

Open the dashboard. Sign in at vortexia.live and turn audio on.
Choose what it hears. Pick Microphone, or Music / system to capture your music directly.
Set the response. Adjust Audio Sensitivity until it moves the way you want.
Add it to OBS. Copy your OBS link and add it as a Browser Source; keep the dashboard tab open.

Specs & output

Engine	Chaos Prime
Render Mode	flux
Iteration Depth	90
Default Zoom	1.70
Colour Shift	150°
Output (Free)	720p / 30fps + watermark
Output (Plus)	1080p / 60fps, no watermark
Output (Pro)	4K / 60fps, brand-kit logo overlay
Audio Source	Browser tab audio (FFT, real-time)
Last Updated	2026-09-28

Frequently asked questions

Why is my overlay not moving with the music?: The dashboard does the listening. Check that audio is on and the dashboard tab is still open, since it can be minimised but not closed, and that Listening to is set to the source your music actually comes from.
What does each part of the music do?: The bass drives the zoom, speed and glow, the mids reshape the pattern itself, and the treble makes the colour more vivid and widens the colour split. A separate detector watches for kicks and sends a pulse on each one.
Can I make it react more or less?: Yes. Audio Sensitivity in the dashboard sets how strongly it responds. Lower it for calm streams, raise it for quiet music.
Is it a transparent overlay?: No. Vortexia draws a solid frame, and most looks are a glowing field around a dark shape, so they work best below your camera and game. For a true overlay, choose a look with dark space such as Bass Tunnel, right-click the source in OBS and set Blending Mode to Screen: the black drops away and the bright parts glow on top.
Is it free?: Yes. The free plan streams at 720p and 30fps with a small watermark, three engines and Twitch. Plus removes the watermark, renders at 1080p and 60fps, unlocks all eight engines and adds automatic YouTube and Kick events.

About the author

The Vortexia team — Makers of the Vortexia engine.

The Vortexia team builds a browser-based, GPU-accelerated audio-reactive visual engine used by streamers and DJs on Twitch, Kick, YouTube Live and TikTok Live.