http://www.hometheatershack.com/roomeq/
REW (Room EQ Wizard) is a Java application for measuring and analysing room and loudspeaker responses.
Must register(simple) for free download.
Features:
1) includes tools for generating test signals
2) measuring SPL and impedance
3) measuring frequency and impulse responses
4) generating phase, group delay and spectral decay plots, waterfalls, spectrograms and energy-time curves
5) generating real time analyser (RTA) plots
6) calculating reverberation times;
7)
calculating Thiele-Small parameters
8) determining the frequencies and decay times of modal resonances
9) displaying equaliser responses and automatically adjusting the settings of parametric equalisers to counter the effects of room modes and adjust responses to match a target curve.
New in REW V5
* Phase & Group Delay (measured, minimum and excess)
* Phase wrap/unwrap, minimum phase generation
* Step Response and Spectrogram plots
* Impedance measurement and Thiele-Small parameter calculation from impedance measurements
* Impulse Response delay calculation and adjustment
* Measurement arithmetic functions, add/subtract/multiply/divide/merge measurement
* Separate windows for overlays, RTA and EQ functions
* Sound level meter with full integrating functionality including equivalent sound level and sound exposure level; mic/meter and soundcard calibration corrections applied; A, C or Z weighting
* New algorithms for EQ adjustment offering exceptional tracking of target responses, can be used over any frequency range
* Waterfalls of predicted results of EQ can be viewed in the EQ panel and can update live as filter settings are adjusted
* Support for QSC DSP-30, Crown USM 810, Behringer DCX2496 and MiniDSP parametric filters
* Resonance analysis to determine the frequencies and decay times of modal resonances with pole-zero plots of the response and any filters applied
* "Modal" filter setting provided for parametric EQ filters to aid in correcting modal decay
Carried over from REW V4
* Free!
* Frequency response measured using logarithmically swept sine signals for fast, accurate measurements using either an SPL meter or measurement microphone
* Real Time Analyser with up to 1/48th octave resolution
* Spectral decay plots, waterfalls and energy-time curves
* Reverberation times derived in accordance with ISO 3382 in octave or one-third octave bands with results for Early Decay time (EDT), T20, T30 and an optimal fit RT60 figure, impulse response can be displayed with octave or one-third octave filter applied
* Signal Generator offering sine waves, square waves, linear and logarithmic sine sweeps, random pink noise (full range, speaker calibration, sub calibration and custom filtered) and periodic pink and white noise
* Measurement import from and export to text files
* Impulse response import from WAV or AIFF files
* Export impulse responses of measurement or filter settings to WAV files with 16, 24 or 32-bit resolution
* Automatic identification of peaks in the response, automatic assignment of filters to peaks and optimisation of filter parameters to counter the peaks
* Support for the Behringer Feedback Destroyer Pro models DSP1124P and FBQ2496, including filter setup via Midi (Midi interface required)
* Support for the TMREQ equaliser in the TAG McLaren AV32R DP and AV192R AV processors, including filter setup via RS232
* Compensation for C-weighting when using an external SPL meter as the input, calibration files can be loaded for soundcard, microphone or SPL meter
* Comprehensive help files within the application and on-line
