You can read ARTA as; Audio Real Time Analysis.

ARTA software contains three programs:

ARTA.EXE - program for the impulse response measurement, real-time spectrum analysis and frequency response measurements.

STEPS.EXE - program for frequency response measurements with stepped-sine excitation.
Simultaneously with a frequency response measurement the program estimates levels of 2nd, 3rd, 4th, 5th and higher order harmonic distortions.

LIMP.EXE - program for the loudspeaker impedance measurement and loudspeaker parameters estimation.

ARTA has functions of following measurement systems:

Signal generator of random and deterministic signals
Impulse response measurement system
Frequency response measurement system
Fourier analyzer
Spectrum analyzer
THD analyzer
Storage scope

With calibrated microphone, ARTA can be used as a virtual IEC class 1 SPL meter with a real time modes:

Integrating SPL meter with 24 hours data logging,
Octave SPL meter with noise rating (NR, NC, PNC, RC,NCB),
Third octave SPL meter with report of loudness in sones and level in phones

ARTA 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 waterfall graphs and sonogram, Burst decay waterfall graphs and sonograms, Energy decay in reverberant environments, Room acoustical parameters, Directivity patterns, Speech intelligibility measures: MTF, STI, STIPA, %AL.

Latest news:

December, 16, 2024:

Program ArtaSetup198.exe refreshed for freeware install of program LIMP.

December, 8, 2024; Important notice:

ARTA software version 1.9.8 is published as freeware (see  Install section).

Note: 

1) ARTA license key selling stopped on March, 30, 2024.

2) The firm ARTALABS is closed in April, 2024.

3) ARTA software has become freeware in December, 2024. The Copywrite owner is author Ivo Mateljan.

4) The web site https://artalabs.hr will be active in 2025. The last version and support files will be available for download.

5) The user support continues for all licensed users.

Figure 1. The ARTA window for impulse response analysis.

Figure 2. The dialog box for measurement of impulse response using four types of signals: periodic noise, swept-sine, MLS and external impulse.

Figure 3. The ARTA spectrum analyzer window.

Figure 4. The Energy decay window with user interface for acoustical parameters estimation

Figure 5. The Cumulative Spectral Decay of two-way loudspeaker box.

Figure 6. The Shaped Burst Decay response of two-way loudspeaker box

Figure 7. The Directivity sonogram

Figure 8. The LIMP window for impedance measurement

Figure 9. The STEPS plot of frequency response, 2nd and 3rd harmonic distortion, measured with stepped-sine.

A sample from registered user list: