Streaming & Broadcast Visualizer

Audio reactive visuals for OBS Studio & Twitch streams.

Integrate live, sound-responsive visuals into your stream overlay without bogging down your CPU or dealing with cloud delay. PulseKani generates real-time 60 FPS WebGL2 graphics with a dedicated Clean Output window designed for OBS Window Capture.

Open clean output workflow Try demo first

✓ Clean Output window (no UI clutter) ✓ Zero-delay local DSP analysis ✓ Transparent / chroma-key ready ✓ MIDI control for scene switching

The honest OBS integration workflow

For the browser workflow, add sound in PulseKani, open Clean output, then capture that window in OBS. PulseKani performs the visuals live while OBS handles your stream layout. Frame rate and end-to-end latency depend on your hardware, capture settings and OBS configuration.

Workflow 1: Web Browser with Clean Output

Open PulseKani in Chrome or Brave. Add your audio (microphone, music file, or browser tab). Click Clean output. A clean popup window opens containing solely the live visual stage with zero buttons or UI. In OBS Studio, add a Window Capture source targeting this window.

Workflow 2: PulseKani Desktop (Spout & Loopback)

The Windows desktop engineering build supports optional Spout GPU texture output and native system-audio loopback capture. These capabilities are separate from the browser app; OBS receiver and physical-display acceptance remain pending.

Chroma Key & Stream Overlays

Select scenes with minimal background or use contrasting palettes to easily chroma-key or luma-key the visuals over your camera feed or gameplay using OBS filters.

Live Stream Deck & MIDI Controls

Map scene transitions, randomize, or intensity to hardware knobs and buttons via PulseKani's built-in Web MIDI support in the Advanced panel for seamless live performance while streaming.

How to set up PulseKani in OBS in 4 steps

1. Open PulseKani & add your audio
Launch PulseKani. Connect your microphone, open a music file, or share browser tab audio from your stream playlist.
2. Open the Clean Output window
Click the Clean output button next to Fullscreen. PulseKani opens a dedicated visual-only window that synchronizes with the main controller via high-speed BroadcastChannel.
3. Add a Window Capture in OBS Studio
In OBS Studio under Sources, click + → Window Capture. Select the pulsekani-output window. Set Capture Method to Windows 10 / 11 or BitBlt.
4. Position and layer your scene
Resize the visualizer overlay to fit your stream canvas, position it behind your webcam or on an intermission screen, and start streaming!

Frequently asked questions

Why is Window Capture better than an OBS Browser Source for music visualizers?

The supported browser workflow captures PulseKani's Clean output window using OBS Window Capture. Add your audio in PulseKani and let OBS capture the live visuals; this does not require a separate audio streaming relay. Check frame rate and audio/video synchronization in your own OBS setup.

Does Clean Output work on a second monitor?

Yes. You can drag the Clean Output window to a second monitor or TV and double-click to maximize it, or use it for live stage projections while keeping your control window accessible on your main screen.

Can I trigger scene changes while in a game or streaming?

Yes. PulseKani supports keyboard shortcuts (1–9 for scenes, R to randomize, Arrow keys to cycle) and standard USB MIDI controllers so you can switch looks without taking focus away from your stream.

Is there an auto-cycling mode for long streams?

Yes. In the Advanced panel, enable Auto-cycle to automatically rotate between scenes every 15, 30, or 60 seconds, or cycle exclusively through your starred favorite scenes.