[Elecraft] Using Voice Files along with Mike Input on a K3

[Ed Steeble]

I tried to use a K3 in the IOTA contest on SSB but ran into a problem.
I couldn't figure out how to satisfactory key the K3 with wave
files from N1MM Logger and also use a Heil Headset. Reading the manual 
it appears that you can have audio input from ONLY the front panel, rear
panel, OR line in. The wave files were coming via the line in and the
mike via the Front panel. Did I over look something?

A fellow team member and I considered paralleling the mike and sound
card input but we didn't want a live mike while wave files were playing.
The Elecraft web site says that their digital voice recorder (KDVR3) is
not yet shipping. For now, does this mean that that I have to use my
MFJ voice keyer (configured for a Kenwood radio) if I want audio files 
AND mike capabilities?

When using a K3, how are others handling SSB contests?

73, Ed
K3IXD