DSSF3 offers a free version of their software that includes a signal generator, sound recorder/player and peak level meter for advanced sound measurement.

The Signal Generator feature allows for the generation of a stereo signal, including tone, noise, sweep, and pulse. With tone, users can choose from sinusoidal, triangle, square, and saw-tooth wave, and can generate different signals with specified frequencies in each channel. Users can also choose between white and pink noise. Sweep is a tone signal of which frequency varies continuously. Pulse signal is generated with a specified number of times, duration, and interval.
Recording with DSSF3 is easy and allows for up to approximately 10 minutes of sound to be captured. Additionally, playback of the recorded sound can be measured using the FFT analyzer, including Spectrum, octave analysis, oscilloscope, ACF and IACF measurements, all displayed simultaneously.
Overall, DSSF3 Basic is an exceptional software for advanced sound measurement, allowing users to accurately generate, record, and playback sound with a variety of measurement options.
Version 5.1.x.x: N/A
Version 5.0.8.x: N/A
Version 5.0.7.x: signal generator
Version 5.0.6.x: FFT analyzer