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LCWO Discussion Forum [Atom LCWO Forum Feed]

This is a simple discussion forum for LCWO users. Feel free to use it for any kind of discussion related to this website.

Thread: exercice at high speed

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AuthorText


Posted: 2012-07-14 01:25
hi.

Being at level 4 of koch method, I am certainly unable to understand a single character in that file. The speed is over 50 wpm I think.

It's from a well known french tv show.

http://dl.dropbox.com/u/20635927/BREF_EPISODES_120712_CAN_273860_video_H_track2_cut.wav

I have cutted it a bit short so morse code starts right away, all of this covered by crowd noise. a sort of easter egg for the final episode.

What's being said ?


Posted: 2012-07-14 15:23

There is no Morse code embedded in that signal


Posted: 2012-07-14 21:07
the first noise sequence could be character "C" however, the sample is too short for a "message" - hi speed morse is unlikely, a broken bearing on a shopping cart at safeways is more likely.


Posted: 2012-07-15 16:04
well, some people were supposedly able to find the message "BREF. OUI OU NON?"

http://p.twimg.com/AxowP_vCMAErnAb.png

But I am not skilled enough with audacity to be able to filter and remove the crowd noise to only get the beep sound left. and get the same as what's on that screenshot.


Posted: 2012-07-15 17:12
So i was able to remove part of crowd noiseand got a better "view" at the morse code. It gives me something like:
..–.. .. (?) — .- (?) .- -.. — .. -.. — -.-.-. .-.. . .-. …-

first character does not seem to mean anyhting and the rest does not make sens

http://dl.dropbox.com/u/20635927/BREF_EPISODES_120712_CAN_273860_video_H_track2_cut_better.wav


Posted: 2012-07-15 20:34
Don't hear it. Can't detect any Morse Code.


Posted: 2012-07-15 23:07
it's at 5000Hz


Posted: 2012-07-16 00:59
change in the RIFF header of the wav file the sample rate to a half or a quarter of the present value, that lowers speed and pitch proportional.

In any general purpose programming language, you can proces the samples in the wav file and put them through a 200 Hz wide band pass FIR filter, in order to omit unwanted noise.



Posted: 2012-07-19 12:21
And: Listen CW not at 5000 Hz. CW is decoded better by ear between 500 and 800 Hz.


Posted: 2012-07-19 12:29
The chirping CW - IF that is really a cw code -and no sound that has coming up by chance - than I can read C M W (something?) W.


Posted: 2012-07-19 14:53
Mike Must be a secret message detected by the devil himself, possibly aliens taking over earth and using french BCtx to infiltrate.

Or some ham working overthere and testing a novel method to stimulate intrest in learning Morse code.


Posted: 2012-08-19 00:05
La estatica del lugar hace pensar en un codigo morse el pudiera construirse como letras pero es imposible que sea originado por un aparato telegrafico...
[deleted]

Posted: 2012-08-19 22:00
Puede ser, se inserta por algún técnico de audio, con el fin de estimular debates como este.


Posted: 2012-08-20 20:23
[quote=zebul666]well, some people were supposedly able to find the message "BREF. OUI OU NON?"
[/qoute]
But only if you play it backwards.


Posted: 2012-08-27 15:02
only the young kids, and bats will be able to decode morse at 5khz :-)

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