Re: Morse code via sound card input

Actually, it would help if you explained why you are need to do this. It makes a lot of difference whether you are planning to use it to help someone who is trying to practice sending Morse code, or if it would be an alternate means of accessing the computer for a partly disabled person who cannot type but can still send Morse.

Also, if the keyer is close enough to the computer to run wires, you might want to consider having it key a line on a parallel port, or one of the inputs (DSR or CTS) on a serial port. The keyer will the input on and off, and you sample the signal periodically (around 10-100 times per secord.) A digital input can be easier to get working than a sound card connection, which may require you to find and fix problems with ground loop induced hum.

Comment on Re: Morse code via sound card input

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Re^2: Morse code via sound card input by aristotle73 (Sexton) on Jul 08, 2007 at 21:15 UTC
I hadn't thought about its use for the handicapped. I had originally intended to use the script as a plugin for XChat to allow the use of a keyer instead of a keyboard for text. This way I could practice morse code without having to use practice drills which are really just repetitive quizzes. Morse code is like a very simple language and practicing in this manner can greatly speed learning (for me anyway). I hadn't considered using the serial port. That might be a better option given that using an audio waveform is more troublesome.	[reply]

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Re^2: Morse code via sound card input
by aristotle73 (Sexton) on Jul 08, 2007 at 21:15 UTC

I hadn't thought about its use for the handicapped. I had originally intended to use the script as a plugin for XChat to allow the use of a keyer instead of a keyboard for text. This way I could practice morse code without having to use practice drills which are really just repetitive quizzes. Morse code is like a very simple language and practicing in this manner can greatly speed learning (for me anyway). I hadn't considered using the serial port. That might be a better option given that using an audio waveform is more troublesome.

[reply]