Measure Your Studio
Measure what your monitors and room are actually doing.
Beta measurement tool. Do not use these results as a substitute for professional acoustic measurement where certified accuracy is required. This first version measures and explains -- it does not yet build any correction. See what v0.1 does not do below.
- Setup
- Level Check
- Left Speaker
- Right Speaker
- Processing
- Results
Optimized for miniDSP UMIK-1 / UMIK-2, but any calibrated USB measurement microphone will work -- this tool never hard-codes a specific device.
No calibration file loaded -- results will be relative, uncalibrated response.
0° calibration means the microphone is pointed directly at the speaker/source being measured -- not straight up. Point the UMIK's capsule at each speaker in turn when prompted.
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No signal yet
Measurement audio is processed locally in your browser. Nothing is uploaded.
Level Check
Make some sound at the microphone -- talk, play a reference track, or the room's normal listening level -- and check the meter below before measuring.
Input Level: —
This reads the raw Input Level reaching the microphone, not a calibrated SPL value, unless a calibration file with real sensitivity information has been loaded above.
Left Speaker
Microphone stays at your normal listening position for this measurement.
Start at a low monitoring level. Measurement sweeps can become loud.
Playing sweep…
✓ Left speaker measurement complete.
Right Speaker
Microphone stays at your normal listening position for this measurement.
Start at a low monitoring level. Measurement sweeps can become loud.
Playing sweep…
✓ Right speaker measurement complete.
Processing
Deconvolving impulse responses…
Studio Measurement
✓ Left ✓ Right Measurement complete
Frequency response
Notable features
Why am I seeing this?
Peak. A peak can occur when reflected and direct sound reinforce each other. At low frequencies this may correspond to a room resonance.
Dip. A deep dip can result from destructive interference. Adding large amounts of EQ boost may not solve an acoustic cancellation.
Impulse response
Time versus amplitude. The direct arrival is marked -- later arrivals are not automatically labeled as specific reflections unless detection is reliable.
Decay
EDT, T20 and T30 are each a specific, standard estimator of reverberation time -- not "RT60" interchangeably. A result only appears where the recording had enough usable decay range above its own noise floor; otherwise this shows "Insufficient decay range" rather than a guess.
Why EDT / T20 / T30 and not just "RT60"?
RT60 is defined as the time for a 60dB decay, which a short or noisy recording often never actually reaches. EDT, T20, and T30 each estimate that same 60dB time from a smaller, more reliably measurable part of the decay curve (0 to -10dB, -5 to -25dB, and -5 to -35dB respectively) and extrapolate it -- they are standard, named estimators, not three different definitions of reverberation time.
Room mode matches
A close match between a measured low-frequency peak and a predicted axial room mode is a likely association, not proof -- a peak can also come from the loudspeaker itself or another mechanism. Theoretical modes also do not predict a measured peak's amplitude, only its approximate frequency.
Why am I seeing this?
Room modes occur when room dimensions support standing-wave patterns at specific frequencies -- see the Room Modes article, or run the numbers yourself in the Room Mode Calculator.
Export for validation
Download the full, un-simplified measurement (frequency response, impulse responses, decay results, detected features) as JSON -- useful for comparing this tool against Room EQ Wizard (REW) using the same microphone, speaker, position and room.
Desktop is the primary environment for this tool -- a stable USB microphone connection and a quiet room matter more here than on any other Studio Music Tools calculator. On mobile you can still view a completed measurement's results, but running a new measurement is not recommended.