After many years of being inactive, I want to get back into amateur radio and brush up my *VERY* rusty Morse. Can anyone recommend a good Morse training program which uses the sound card, please? I want to listen to it with headphones. Preferably one which also has a GUI rather than just using the command line, but I am not all that fussy about this. This Koch system sounds rather interesting. I could spend hours Googling and downloading several to try, but a recommendation would be better. Very many thanks 73 Keith G4JVX