Linux Morse Code Decoding Software

demorse:
demorse is a Morse code decoding application for the console. It detects the receiver's audio output via the computer's sound card, using simple dsp techniques, and then decodes the mark/space sequence into characters which are printed on the console screen. demorse has some tolerance to bad operator "fists" and noise or interference, however it could be improved by using more sophisticate audio signal detection. demorse can measure and adapt to the Morse transmission's speed within the range of 10-30 words per minute, the default starting speed being set to about 20 wpm.

Manual Read more details on-line or download demorse's manual.

PackageDownload source package of demorse.

xdemorse:
xdemorse is a GTK+ based Morse code signal decoder. It has an integer-arithmetic FFT-derived "waterfall" display of the incoming audio signal's spectrum, as well as a 'scope-like display of the audio detector's output and status of the mark/space discriminator ("slicer"). xdemorse also has CAT for the FT-847 and FT857 and this can be used to net the receiver's frequency to the incoming signal, by clicking near its trace in the waterfall display.

Manual Read more details on-line or download xdemorse's manual.

PackageDownload source package of xdemorse.

xdemorse This is xdemorse decoding the CW beacon of the HAMSAT satellite on 145.863 MHz. The satellite was more than 2000 Km away and the transmitter power is about 1W ERP. There are errors but the signal was weak and fading and subject to Doppler shift. The latter can be seen in the broadening of the trace in the waterfall display, which is due to the Doppler shift being automatically compensated by xsatcom.