What's New in V4.10

Spectrum and RTA Displays

The Spectrum graph page offers a spectrum analyser plot with resolution of up to 0.3Hz or Real time Analyser (RTA) plots with resolutions up to 1/48th octave. It calculates THD and THD+N distortion figures and shows the relative levels of the 2nd to 9th harmonics of test tones. It allows high resolution measurement of system responses without having to connect to the system being measured by either playing a pink noise signal through the system or, for much more precise low frequency measurements without the very long averaging required for pink noise, playing the new pink periodic noise signals from REW's own signal generator saved as WAV files. More details...
RTA
Spectrum Plot

Reverberation Time Displays

The RT60 graph page shows reverberation times in octave or one-third octave bands calculated in accordance with ISO 3382. Related plots for the current measurement, including the Schroeder curve used to derive the RT60 figures and the linear fits for the various RT60 parameters, can be viewed on the Impulse graph page. The Impulse page also allows an octave or one-third octave band filter to be applied to the current measurement and the associated frequency responses. More details...
RT60 curves

Extended Range for Waterfall and Spectral Decay

The waterfall and Spectral Decay plots now span the full range of the measurement. The waterfall controls have also been revised and extended and offer further control over the plot.

Automatic Soundcard Compensation

A loopback connection on the left soundcard channel can be used to provide an automatic calibration reference settings as an alternative to using a soundcard cal file. This has the advantage of removing the soundcard's influence from the impulse response as well as the frequency response (the calibration file method only corrects the frequency response) and allows measurement of the delay through the system being tested, useful for checking or setting speaker distances. More details...

Sweep Start Frequency

The measurement panel now allows the start of the sweep to be specified as well as the end, allowing convenient measurement of equipment that is not tolerant of low frequencies (tweeters, for example).
Sweep Settings

Numerous other improvements

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