[Ham-Mac] mixed mode wav file

[w1hkj]

Several users have questioned whether fldigi might need various bandpass 
filters, notch filters etc.  Most of the questions were targeted at the 
waterfall representation.  I thought it might help if you were able to 
observe how the various decoders can work in the presence of band 
limited white noise and other modes, all within a single 2500 Hz audio 
passband.

Download this file http://www.w1hkj.com/downloads/fldigi/mixed-modes.wav

and place in in your fldigi.files (~/.fldigi on linux  and OS X) 
folder.  The file is about 1.5 Mg large.

Then play back the wav file using the File/Audio/Playback menu item.  
You will find RTTY, CW, PSK-31, PSK-63F, MFSK-16, HELL and THROB-4 
signals combined with band-limited white noise.  This will sound like a 
cacophony if you play it with a wave player.  You will probably be able 
to pick out the sounds of CW and RTTY.  Perhaps one or two others.

73, Dave, W1HKJ