The practical guides.
HTM starts from your room, then imports your measurements to confront them with its predictions. These quick guides show the essentials: import a 3D model of the room (or scan it), then produce measurements with the free reference tools: REW for acoustics, ColorHCFR for the picture.
Import a 3D model of your room
Instead of typing dimensions by hand: import a SketchUp / Blender / Rhino model (or scan with your phone). HTM reads dimensions, shape (even an L), attic slopes and beams. Formats and step-by-step export.
Read the 3D import guide Acoustics · soundMeasure your room with REW
From mic to .mdat file: setup, sweep measurement, reading the RT60, waterfall and early reflections, then importing into HTM. With REW, the free, cross-platform community tool.
Read the REW guide Picture · videoCalibrate your picture with ColorHCFR
From probe to .chc file: SDR / HDR reference, greyscale and gamut measurement, reading the ΔE, then analysing in HTM. With ColorHCFR, free and open-source.
Read the ColorHCFR guide MethodologyHow did we proceed? The measured fabrics
Insertion loss of four stretched fabrics (acoustic screens, frame facings), measured in REW at 0° and 45° against a free-field reference. The full protocol, the curves, and the stated limits.
See the methodologyWhy these guides are free.
HTM drives neither the mic nor the probe: it imports what those tools produce. The more careful your measurement, the finer HTM's analysis. These guides lower the barrier to entry, without needless jargon, so you quickly get a usable file.