CwGet is a morse decoder which allows you to receive morse codes via your sound card.

The program displays the spectrum of the current signal (blue line) and the peak detector of spectral components (green line). The vertical red line represents the working frequency of the filter.

The 'AFC' (Automatic Frequency Control) button lets you adjust the working frequency to the closest peak frequency, the 'GotoMax' button enables you to jump to the peak frequency in the bandpass, and the 'AutoGTM' button allows you to switch the 'GotoMax' automatic mode on.

In addition, the 'AutoThreshold' button lets you automatically tune a signal's threshold.

Your sound card should be able to work in a mono, 16-bit, 11025Hz mode. Moreover, the choice of a signal source (line-in or microphone input) and record level are made by the operating system (Volume icon on the Windows taskbar). Check that you do not overload the input because it can degrade the operation of the program.