"gurgling" noise at 6-10 seconds in 202 204 2303 had been solved
https://dl.dropbox.com/u/1593421/otp22/messagedesktwf.wav
More info:
http://otp22.referata.com/wiki/202_204_2303/Investigation
[2012-12-09 22:49:25] <LordHeinrich> I looked at that as a spectrogram and didn't find anything interesting, sadly
[2012-12-09 22:49:29] <LordHeinrich> I think it's just an error tone
[2012-12-09 22:49:41] <Ymgve> LordHeinrich: no, the digital signal, the one we're trying to decode now
[2012-12-09 22:50:21] <Ymgve> the "gurgling" noise at 6-10 seconds
[2012-12-09 22:50:45] |<-- Mortvert has left freenode ()
[2012-12-09 22:51:52] <R6mco> Ymgve: fooling around with MFSK-4 without a clue, you can better buy a lot in the state lottery ; -)
[2012-12-09 22:53:20] <Ymgve> considering the other message in the same place only said "MESSAGE DESK GA" this will probably turn out to be something equally boring
[2012-12-09 22:54:21] <R6mco> I wonder why this was 'normal' rtty
[2012-12-09 22:54:41] <Ymgve> PM works in mysterious ways
[2012-12-09 22:57:24] <R6mco> Ymgve: yeah, but there are limits ... if it is a bit phreaking game... ok ... like 'crack the code'
[2012-12-09 22:57:35] <R6mco> but this is information diarrhea
[2012-12-09 23:01:21] <Ymgve> R6mco:
http://de.wikipedia.org/wiki/Cellular_Text_Telephone_Modem
[2012-12-09 23:01:26] <Ymgve> see something you recognize?
[2012-12-09 23:03:21] <R6mco> 400 Hz / 600 Hz / 800 Hz / 1000 Hz
[2012-12-09 23:04:26] <Ymgve> bingo
[2012-12-10 01:06:13] <Ymgve> '\x05ME\x16S\x16\x16\x16\x16\x16' '\x05SAGE\x16\x16\x16\x16\x16'
[2012-12-10 01:06:21] <Ymgve> and I don't care enough to transcribe the last part
[2012-12-10 01:06:48] <Adah> What's this from?
[2012-12-10 01:06:58] <Ymgve> \x16 are idle chars, \x05 is start of block
[2012-12-10 01:07:07] <Ymgve>
http://vocaroo.com/i/s1pIH6tqiewI
[2012-12-10 01:08:15] <Ymgve> it's a recording of someone typing MESSAGE and I bet the last part I haven't decoded will contain DESK
[2012-12-10 01:08:28] <Ymgve> the encoding is the one used in
http://de.wikipedia.org/wiki/Cellular_Text_Telephone_Modem
[2012-12-10 01:09:06] <Ymgve> code used for decoding:
http://pastebin.com/uR5mPgpL
[2012-12-10 01:16:27] <Lurker69> how did you find that encoding ymgve?
[2012-12-10 01:16:47] <Ymgve> Lurker69: googled a lot for the frequencies used
[2012-12-10 01:16:53] <Ymgve> 400, 600, 800, 1000hz
[2012-12-10 01:18:15] <nadando> why are all those extra characters in there?
[2012-12-10 01:18:35] <Ymgve> they are idles
[2012-12-10 01:18:41] <Ymgve> this is like a teletype thing
[2012-12-10 01:18:47] <Ymgve> sends a letter when someone presses a key
[2012-12-10 01:18:55] <Ymgve> sends an idle char if nothing has been pressed

Posted: Mon Dec 10, 2012 4:04 am