Howard,
Two things:
First download his waves.zip file. You can then go into the options of the
Field Day program and configure it for speech. There are three radio
buttons: no speech, callsign only, or all fields. I find callsign is enough
because you know the order of the other fields for entering the number and
section designator. It is quite useable.
If you make a mistake, you need to use the mouse and left-click on the entry
you need to edit. But, other than that, it is quite transparent and very
accessible.
Hth,
Steve, K8SP