Winrad is a software program designed to implement a so-called Software Defined Radio (SDR). In a nutshell, it accepts a chunk of up to 192 kHz coming from a half-complex mixer in form of two signals, I and Q, fed to the PC sound card. It does a fine tuning inside that segment with a point-and-click technique, demodulates (LSB/USB/CW) what has been tuned and optionally applies a series of filters to the results of the demodulation.