Define the space
With a laser measure take four numbers: length from the front of the stage to the back wall, width between side walls, wall height and the height of the highest point of the ceiling. That is enough for the model to start.
Dimensions
metersStage
top of the planMain use
Audience
listening areaMaterials
typical absorptionExamples
Loading an example replaces the current project. The tool always starts from zero and keeps nothing on its own: use “Save project” to keep your work.
Read the photos
Upload photos from the stage toward the back, from the back toward the stage, of both side walls and of the ceiling. They help you recognize materials and ceiling type, and measure heights from a known reference such as a 2.10 m door.
Identify materials with an AI
optional and freeYou can ask any AI assistant to look at your photos and tell you what each wall is made of. Your photos never pass through this page.
Copy the prompt
It includes the material list this tool understands and the reply format.
Paste it into your assistant with the photos
Use ChatGPT, Claude, Gemini or any assistant that accepts images. Attach the photos along with the prompt.
Paste the reply here
The JSON block it returns is enough. Review the results before applying them.
Cover the room
Drag the speakers on the plan and watch level and intelligibility change. The goal is an even neutral zone across the whole audience.
First enter the room’s length, width and wall height in tab 1. Those three numbers are enough to start calculating.
Reference floor plan
optionalUpload the room’s floor plan, as an image or PDF, to see it under the coverage map. Set the scale, align the corners and place the speakers over the real shape.
Control the reverb
See how long the room rings in each band, which surfaces keep it ringing and how much absorption you need to reach a useful time for your use.
First enter the room’s length, width and wall height in tab 1. Those three numbers are enough to start calculating.
Reverberation time
RT60 per octave bandRoom modes
Suggested treatment
for the empty roomWhat each surface contributes
absorption at 1 kHzRecommendations
Get to flat
First the room estimate, then the real measurement with a microphone. The measured curve wins: what you see there is what you correct.
First enter the room’s length, width and wall height in tab 1. Those three numbers are enough to start calculating.
Natural room response
estimated at the mix positionHow much the room colors a flat system, based on its reverberation per band and the distance to the speakers. Below the Schroeder frequency the curve is only a guide.
On-site measurement
pink noise and third-octave analyzerWith a measurement microphone at the mix position, pink noise through the system should look flat. This curve is the one that counts: what you see here is what you correct; the estimate on the left is only a guide.
Paste a measurement from REW, Smaart or another app
Two columns: frequency in Hz and level in dB. Spaces, tabs or commas work; header lines are ignored.
RT60 with a clap
calibrates the modelPress the button, wait for the countdown and pop a balloon or clap hard at an audience position. The measured time adjusts the model’s absorption so the other numbers get closer to reality.
Diffuse-field model with per-speaker directivity. Use it to decide where to hang, how much to absorb and what EQ to start from; the on-site measurement has the final word. Absorption coefficients are typical literature values.