Hi,
Thanks, KSKelvin and Jay. I tried the “Sound card” function. 
The output signal was generated by QSpice simulation and fed to the PC audio line output terminal using the waveform viewer’s “Listen to trace” feature. The signal was measured through the PC audio line input terminal using the waveform viewer’s “Scope/Spectrum analyzer.”
The “Scope/Spectrum analyzer” is a free-running oscilloscope with automatic range, so I must stop it when I want to see the signal in detail. The amplitude of the signal is not the same as in the simulation, so care must be taken not to damage the DUT.
Anyway, I think it’s a very interesting function!!