Howard wrote rec.radio.amateur.homebrew on 8 Jul 2004 17:03:15 -0700, the
following...
Hello and thanks for reading this note.

I am looking for software (preferably freeware!) that will kick out
DTMF tones on my PC speaker.

I am putting a decoder together and want to use this for testing.

Any info appreciated.

73 de WA2AFD

Hello,

The only one I know of is DTMFF and you can find it at...
http://www.bookcase.com/library/soft....hamradio.html
It is old (1997) and runs under DOS.
It's cardware.

Maybe someone else will know of one a little newer.

Mark S.