Acoustics For Musicians. Game Designers. Architects. Post Production. Film. Everyone.

Impulse is Lese Audio Technologies' foray into easy, realistic & affordable acoustic simulation for everyone. 

Impulse Engine

After 4 years of research & experimentation, the end result is the Impulse Engine, a scalable, multi-algorithm acoustic simulation system that’s capable of any sort of reverb-related job with minimal work; We use it in real-time in our plugins like Eigen & Transfer, and now we are offering a piece of standalone software called… Impulse!

Impulse uses very large (or small) amounts of rays that get cast + processed in different ways to simulate sound propagation.

Full of Features

The Impulse engine was directly designed with customizability & simplicity in mind. On top of that, the Impulse Editor was also designed to be easy to interact with & be modular in nature. The following are some of Impulse’s largest (current!) features;

Material Assignment

In Impulse,  you can set any Acoustic material to any section of the scene that you want. Assignment is simplified to surfaces that make up larger sections (like walls), as opposed to treating the scene like conventional 3D geometry.

Preview Mode

Impulse features an auralization system for previewing how the acoustics might sound in your scene. Tweak any surface’s material, change which source & listener you’re using, and adjust other parameters, all in real time.

High Compatibility

Impulse handles all of the most common 3D model formats out of the box. Import standardized formats like .obj, .stl, and .fbx. You can even import many kinds of project files directly from other 3d modelling software, such as Blender & 3ds Max.

Interactivity Is Key

Impulse is designed to work the way that you do. The way that you interact with the viewport supports multiple ’emulations’ of how interaction functions in various other 3D-oriented applications, including Blender, Unity, and Unreal Engine.

Simulation Controls

The default settings for simulating are designed to work well for general purpose use. However, the depth of acoustic reflections, the number of rays, as well as other parameters can be fine tuned to your desires & constraints.


Beyond simulation, when you render your impulse responses, there are a number of formats that are currently available, ranging from conventional mono & stereo channel configurations, to realistic binaural ones. Impulse can even render directly to ambisonic channel sets, in multiple normalization methods, up to the seventh order.

Powered By Impulse

The Impulse Engine isn’t something that can only be found through our own editor; We’ve chosen to share our tech with other developers (and we’ve also used it in some of our own plugins as well). Check out our current collaborations:

AudioThing: Fog Convolver 2

AudioThing’s Fog Convolver 2 convolution reverb has been updated with an all new space simulator featuring a lightweight version of the Impulse Engine that accurately simulates early reflections & a rich reverb tail.

Lese Audio Technologies: Eigen

Lese’s own Eigen VST3 / AU / AAX Plugin uses a simplified version of the Impulse Engine to simulate early reflections, analyze room resonances & render impulse responses!

Do you have a product / idea that you think would pair well with the Impulse Engine? Let us know at


Sign up here to participate in Impulse’s beta program. Give us feedback & find bugs and we’ll give you a heavy discount once it’s released!