Voice Encryption

["Kelly Keeton" <kellyrkeeton () gmail com>]

Is there any software that will encrypt voice on the fly? I know there
is PGPfone but that's for use with a existing VoIP Phone product.

My use case is.. if I want software to encode my voice in software on
a laptop over a POTS or Cellular phone do decrypt via far end software
and phone. I understand the limitations to some of this due to the
audio spectrum available on the equipment but not asking if its
possible more, is there software that (ideally opensource) that will
do this?

-Kelly