The STEPS is a program for frequency response measurements with stepped-sine excitation. The ARTA program is also a powerful analyzer of gated impulse response, smoothed frequency response (in 1/n-octave bands), step response, impulse response envelope (ETC curve), cumulative spectral decay curve, energy decay in reverberant environments, room acoustical parameters and speech intelligibility measures - STI and RASTI. The ARTA is a program for the impulse response measurement, for real-time spectrum analysis and for real-time frequency response measurements. They are tools for audio measurements and analysis in acoustical and communication systems. The ARTA Software consists of three programs: ARTA, STEPS and LIMP.