Physics-based speaker and subwoofer placement for your actual room. No mic needed. No guesswork.
Free room analysis — no account needed
Type width, depth, and height - or draw any shape with the polygon editor.
A professional-grade physics simulation engine computes your room's resonant modes and reverberation time in seconds.
The optimizer tests thousands of speaker and listener positions to find the flattest response.
Built with methods used in professional acoustic consulting
No mic. No guesswork. Any room shape.
L-shaped, angled walls, alcoves - not just rectangles.
Finite element analysis, not rules of thumb.
No measurement mic, no calibration, no setup.
Full analysis runs in your browser - no uploads, no waiting.
In any room, low frequencies interact with walls, floor, and ceiling to create standing waves called room modes. These modes cause certain bass frequencies to be dramatically louder or quieter depending on where your speakers and listening position are located. Moving a subwoofer just a foot or two can mean the difference between boomy, uneven bass and a smooth, accurate frequency response. Atuund uses finite element modal analysis to model your room's acoustics and find the placement that minimizes these peaks and nulls.
Enter your room dimensions and Atuund builds a 3D acoustic model using finite element methods (FEM) — the same approach used in professional acoustic engineering. The solver computes your room's resonant modes, then the optimizer searches thousands of possible speaker and listener positions to find the arrangement with the flattest bass response. The entire analysis runs in your browser in under 30 seconds.
Traditional room analysis tools like REW require a calibrated measurement microphone and careful setup. Atuund works from room dimensions alone. While measurement-based approaches capture real-world absorption and diffusion, physics-based modeling gives you an excellent starting point for speaker placement before you ever run a measurement sweep.
A room mode calculator identifies the resonant frequencies of your room based on its dimensions. At these frequencies, sound waves reflect between parallel surfaces and create standing waves — areas where bass is reinforced or cancelled. Knowing your room modes helps you choose speaker and listener positions that avoid the worst peaks and nulls.
The most common approach is the "subwoofer crawl" — placing the sub at your listening position, then crawling around the room to find where bass sounds most even. Atuund automates this process computationally, testing thousands of positions against your room's acoustic model to find the optimal spot.
RT60 is the time it takes for sound to decay by 60 dB after the source stops. It's the standard measure of how "reverberant" a room is. A home listening room typically targets an RT60 of 0.3–0.6 seconds. Too long and speech becomes muddy; too short and the room feels dead. Atuund calculates RT60 based on your room size and surface materials.
No. Atuund uses physics-based modeling from your room dimensions, so no microphone or special equipment is needed. A calibrated mic (like the miniDSP UMIK-1) is still useful for fine-tuning after you've placed your speakers, but Atuund gives you the optimal starting positions without one.
Atuund supports any room shape. Enter width, depth, and height for rectangular rooms, or use the polygon editor for L-shaped rooms, irregular spaces, and other non-rectangular layouts. The finite element solver handles any geometry.
Atuund uses finite element method (FEM) modal analysis to model room acoustics. Built for hi-fi enthusiasts, home theater builders, and anyone who wants better sound from their speakers.