Interesting digital modes

[Shannon Mishey]

I have been playing quite a bit with low power modes that work well in high 
noise on HF, such as PSK31 (http://www.kender.es/~edu/psk31.html),Throb 
(http://www.lsear.freeserve.co.uk/page3.html) and various Hellschreiber 
modes (http://www.qsl.net/zl1bpu/).

In my quest for additional information, I ran across the following URL 
which has all kinds of soundcard DSP programs, many of which I had not 
heard of before.  Thought some of you might be interested. The URL is 
http://www.ietc.ca/home/bill/bbs.htm

Shannon N8TBM