I need to add the ability to record a call to an existing
infrastructure, and I'm intending to use FreeSwitch to do this. The
recording needs to happen upon a DTMF command, which I understand is
normally done via bind_meta_app. From what I can tell, bind_meta_app
requires that you use the * key in addition to some other key.
Unfortunately, the system is already doing something else with *, so
that's not a key I can use to get this to work.

My question, then: what is the best way to record a call using DTMFs
that do not include *?

- Should I have Freeswitch forward an appropriate DTMF to a
controlling application that starts recording?

- Should I try to modify the bind_meta_app code to use another digit
instead (say, #)?  If so, where is the right place to look for this? 

As a separate, but related question, I also need to play a disclaimer
when the recording starts ("This call is now being recorded."). Is it
OK to use bind_meta_app to bind 2 apps to the same DTMF combo?