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Welcome to SpectraPLUS-RT

SpectraPLUS-RT is a powerful dual channel  spectrum analyzer.  The program interfaces with any Windows compatible sound card to provide real time spectral analysis. It supports Narrowband, 1/1 Octave and 1/3 Octave measurements and includes a Recorder and a Signal Generator utility which produces tones, pink noise, white noise, and swept or stepped sinewaves.  Although all signal processing is performed on the CPU, real-time performance is possible with today's machines. 

See AlsoBasic Operation, What is a Spectrum Analyzer