MusicReasonRooms, Monitoring, and Acoustic Calculations
Room modes, placement, and monitoring math
This category owns calculations about rooms and monitoring: modal resonances, decay time, speaker placement, and listening geometry. It never claims to diagnose an actual, untreated room, since a real room always departs from the rigid rectangular assumption every formula here starts from.
An ideal-room prediction, not a measurement
The Room Mode Calculator anchors this category, enumerating the axial, tangential, and oblique resonant frequencies an ideal rigid rectangular room of a given size would produce. It states its speed-of-sound assumption plainly and treats the result as a starting point for the placement and treatment decisions that come next, not as a substitute for a real measurement in the room itself.
Tools in this category
Room Mode Calculator
Predict the axial, tangential, and oblique resonances of a rectangular room.
Delay Alignment Calculator
Convert a path-length difference into a time-alignment delay.
RT60 Estimator
Estimate idealized Sabine reverberation decay from volume and absorption.
Schroeder Frequency Calculator
Estimate the Schroeder transition frequency from room volume and RT60.
Speaker Placement Explorer
Compare symmetric starting positions for a stereo speaker pair.
Listening Position Calculator
Compare a listening coordinate against room and speaker geometry.
Sound Pressure Distance Calculator
Estimate free-field sound-pressure level change between two distances.
Room Treatment Estimator
Estimate total equivalent absorption needed to reach a target RT60.