System Two + DSP analog domain test set with all the analog capability of the SYS-2022, plus DSP modules for generation and analysis of multitone signals, FFT spectrum analysis, wave-form display, MLS (maximum length sequence) quasi-anechoic acoustic testing, objective testing of low-bit rate coders, and other advanced applications. In addition to the analog generator and analyzer, DSP generated signals (including stereo sine, dual sine, variable phase sin, shaped burst and IMD) are available as well a DSP Audio Analyzer with an AC reading meter, two AC level meters and two phase meters.