Desktop software
REW — Room EQ Wizard
Room and loudspeaker measurement, impulse response, phase, decay and EQ analysis. Download for Windows, macOS or Linux.
DOWNLOAD REW ↗MEASUREMENT SOFTWARE
Start with the right tool.
iOS / iPadOS app
AudioTools
Studio Six Digital’s iOS/iPadOS audio measurement platform, including SPL, FFT and other analysis modules. Apps and in-app purchases are obtained through Apple.
VIEW IN APP STORE ↗App / modules
HAA CinemaTools
Home theatre measurement and calibration workflows within the Studio Six Digital ecosystem; check module and purchase requirements.
VIEW IN APP STORE ↗Apple TV app
Surround Generator for Apple TV
Multichannel test signals for checking surround-system setup. Opens the Apple App Store listing; installation requires a compatible Apple TV.
VIEW IN APP STORE ↗PRACTICAL PLANNING TOOLS
Useful Calculators
A few calculations can help you ask better questions before you buy. These external tools provide estimates, not guarantees of measured real-world performance.
Room design
Room modes & dimensions
Explore how room dimensions affect low-frequency resonances. Use the results to inform questions about seating and subwoofer placement, not as a substitute for measurement.
AMROC ROOM MODE TOOL ↗Screens & projection
Projector throw & image size
Check whether a projector can fill the intended screen from the available mounting distance. Confirm the exact projector model and lens configuration.
PROJECTORCENTRAL CALCULATOR ↗Loudspeakers
Listening level, distance & sensitivity
Estimate the amplifier power needed to achieve a target listening level. Results depend on assumptions about room acoustics and speaker ratings.
EXTRON POWER CALCULATOR ↗Amplification
Amplifier sizing & headroom
Understand how sensitivity, distance, peak SPL and headroom affect amplifier selection. Nominal impedance and published wattage are only part of the picture.
CROWN AMPLIFIER GUIDE ↗Subwoofers & acoustics
Room resonances
Use a room-mode visualiser to see why bass may vary with room dimensions. Final subwoofer positioning and alignment require real measurements.
EXPLORE ROOM MODES ↗Calibration
Measurement & analysis
Room EQ Wizard provides measurement and analysis functions useful for understanding loudspeaker and room behaviour. It is software, not a substitute for a qualified calibrator.
EXPLORE REW ↗Links are independent third-party resources; their features and availability may change. Use the calculators as planning aids and verify important results against equipment specifications and professional measurements.
GUIDES & SUPPORT
Useful reference material.
Foundational reading
Sound Reproduction — Floyd E. Toole
The acoustics and psychoacoustics of loudspeakers and rooms: a foundational reference for understanding sound reproduction and listening-room performance.
FIND THE BOOK ↗Acoustics reference
Master Handbook of Acoustics — F. Alton Everest
A comprehensive introduction to acoustic principles and their practical application, including room acoustics, sound isolation and acoustic treatment. Later editions are co-authored with Ken C. Pohlmann.
FIND THE BOOK ↗Audio design
CEDIA/CTA-RP22 — Immersive Audio Design
Performance-based immersive audio system design, speaker layout and engineering criteria.
DOWNLOAD RP22 PDF ↗Video design
CEDIA/CTA-RP23 — Immersive Video Design
Recommended practice for immersive video system design. Consult CEDIA for the official publication and availability.
VIEW CEDIA ↗HDMI systems
CEDIA/CTA-RP28 — HDMI System Design & Verification
Recommended practice for reliable HDMI system design, testing and verification.
ACCESS VIA CEDIA ↗Book listings are provided for reference. Availability and editions vary by bookseller; The Home Theatre Engineer is not affiliated with the authors or publishers.