Studio Monitor Calibrator
This studio monitor calibration tool plays pink noise to one monitor at a time, captures it with your mic, and overlays the left vs right frequency response, reads the relative L/R balance, and offers rough EQ hints — plus the standard 85 dB SPL reference-level procedure.
ℹ This is an uncalibrated measurement: you see your monitor + room + microphone combined at one position, on a relative dB scale — it cannot read absolute SPL, so it can’t set 85 dB for you (use an SPL meter; the steps are below). The L/R balance is relative and only valid with the mic centred between the monitors. Built-in mics colour the highs and roll off the deep bass, so judge the shape and the L-vs-R match, not exact numbers. The test tone plays through your speakers; the mic is analyzed live and never recorded.
Left · Right · combined (L+R) · grey = live. Relative response (normalised to each channel’s own average = 0 dB).
How It Works & the 85 dB Setup
The tool plays pink noise to a single monitor (hard-panned left or right), captures the result with your microphone at the listening position, removes pink’s natural −3 dB/octave tilt, smooths to about a sixth of an octave and normalises each channel to its own average. The result is a real-time RTA (real-time analyzer) view of the monitor frequency response at the sweet spot. Save the Left measurement, switch to Right, save again, and the two curves overlay so you can see how well the monitors match and where the room/speaker response rises or dips. The L/R balance compares the broadband level the mic captured from each side; with the mic centred, equal levels mean the channels are gain-matched. The EQ hints flag the biggest peaks and dips, but they’re a guide only — fix reflections and modes with treatment first, since EQ can’t repair a cancellation null. Before calibrating, it is worth checking the speaker placement optimizer to confirm your monitors and listening position are in an arrangement that minimises early reflections and bass buildup at the mix position.
The 85 dB SPL reference (you need an SPL meter for this part). Studio monitoring uses a fixed playback level so mixes translate: the film/post standard is 85 dB SPL (C-weighted, slow) per channel from pink noise at −20 dBFS, while music mixers often work quieter at around 79–83 dB in smaller rooms following a K-System approach. To set it: send −20 dBFS pink noise to one monitor, put an SPL meter (C-weighted, slow) at the listening position pointing up, and adjust that monitor’s gain until it reads your target; repeat for the other monitor at the same number. Working at a consistent, moderate level also keeps you in the equal-loudness (Fletcher–Munson) region where the ear’s frequency sensitivity is reasonably flat, reducing the temptation to over-boost bass at low volumes. This calculator can’t do that step because a normal microphone isn’t calibrated to a known SPL — but it can confirm the two channels are matched, show their relative frequency response shape, and guide the gentle monitor EQ adjustments or room correction moves needed to tighten the overall balance. A dedicated SPL meter or a calibrated measurement mic is the right tool for the absolute level. To investigate the low-frequency room modes that often dominate the bass response, the room mode calculator can predict axial, tangential and oblique modes from your room dimensions before you even start measuring.