This is used by live sound engineers to set up concert sound systems before a show and to monitor and adjust these systems during the performance. Using its dual-FFT mode, Smaart compares one channel with the other to show the difference. Smaart's transfer function requires a stereo input to the computer because it analyzes two channels of audio signal. Transfer function SmaartLive version 4 in transfer function mode, showing several captured traces of an active crossover The software works with computer audio protocols ASIO, Core Audio, WAV or WDM audio drivers. Smaart can be set to sample rates of 44.1 kHz, 48 kHz or 96 kHz, and to bit depths of 16 or 24. A computer having a dual-core processor with a clock rate of at least 2 GHz is recommended. The latest version of Smaart 8 runs under Windows 7 or newer, and Mac OSX 10.7 or newer, including 32- and 64-bit versions. This feature allows the software to 'ignore' later signal reflections from walls and other surfaces, increasing in coherence as the audio frequency increases. The FFT implementation of Smaart includes a proprietary multi-time window (MTW) selection in which the FFT, rather than being a fixed length, is made increasingly shorter as the frequency increases. It includes maximum length sequence (MLS) analysis as a choice for impulse response, for the measurement of room acoustics. Smaart is based on real-time fast Fourier transform (FFT) analysis, including dual-FFT audio signal comparison, called "transfer function", and single-FFT spectrum analyzer. As of March 2016 Smaart was in its 8th version. First written as a native Windows 3.1 application to work within Windows 95 on IBM-compatible computers, in 2006 a version was introduced that was compatible on both Windows and Apple Macintosh operating systems. Smaart has been licensed and owned by several companies since JBL and is currently owned and developed by Rational Acoustics. Impulse Response mode also includes a suite of acoustical intelligibly criteria such as STI, STIPA, Clarity, RT60, EDT, etc. The impulse response mode will display time domain graphs such as Lin (Linear), Log (Logarithmic), ETC (Energy Time Curve), as well as Frequency, Spectrograph, and Histogram graphs. Real-Time mode views include single channel Spectrum and dual channel Transfer Function measurements to display RTA, Spectrograph, and Transfer Function (Live IR, Phase, Coherence, Magnitude) measurements. Smaart has two modes: Real-Time Mode and impulse response mode. Smaart is a real-time single and dual-channel fast Fourier transform (FFT) analyzer. A standalone sound pressure level monitoring only version called Smaart SPL was released in 2020. An acoustician version has been offered as Smaart Acoustic Tools, however as of Smaart v7.4, Acoustic Tools have been included within the Impulse Response mode of Smaart. As of 2008 the product has been branded as simply Smaart. The product has been known as JBL-SMAART, SIA-SMAART Pro, EAW SMAART, and SmaartLive. Smaart is a source-independent analyzer and therefore will work effectively with a variety of test signals including speech or music. Most earlier analysis systems required specific test signals sent through the sound system, ones that would be unpleasant for the audience to hear. It is designed to help the live sound engineer optimize sound reinforcement systems before public performance and actively monitor acoustical parameters in real time while an audio system is in use. Smaart (System Measurement Acoustical Analysis in Real Time) is a suite of audio and acoustical measurements and instrumentation software tools introduced in 1996 by JBL's professional audio division. Windows XP or newer, Mac OS X v10.5 "Leopard" or newer
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