This is the latest version as of January 2003. This version includes all features the DSSF3 has as of January 30, 2003. (The DSSF3 is our best sound measurement/analysis software and has been frequently updated.)Quality sound measurement software equivalent to at least $10,000 in hardware.The software license of RAL costs just $24, but RAL is more functional than the usual FFT analyzer. General real-time measurement function is entirely included. It has a signal generator and FFT analyzer for supervising distortion of the frequency characteristic, a S/N ratio, and a volume level.